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Finding the Fourth Proportional to 128,015,998.40, 192,107,978.40 and 73,428,478.40

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Solution

The fourth proportional to 128,015,998.40, 192,107,978.40 and 73,428,478.40 is: 110,190,888.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,015,998.40 : 192,107,978.40 = 73,428,478.40 : x
  2. Step 2: Convert to fraction form
    128,015,998.40/192,107,978.40 = 73,428,478.40/x
  3. Step 3: Cross multiply
    128,015,998.40x = 192,107,978.40 × 73,428,478.40
  4. Step 4: Simplify right side
    128,015,998.40x = 14,106,196,542,412,068
  5. Step 5: Solve for x
    x = 14,106,196,542,412,068/128,015,998.40
  6. Step 6: Final answer
    x = 110,190,888.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.