Home / 128,309,993.60-192,463,240.80-42,051,214.40

Finding the Fourth Proportional to 128,309,993.60, 192,463,240.80 and 42,051,214.40

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Solution

The fourth proportional to 128,309,993.60, 192,463,240.80 and 42,051,214.40 is: 63,076,248.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,309,993.60 : 192,463,240.80 = 42,051,214.40 : x
  2. Step 2: Convert to fraction form
    128,309,993.60/192,463,240.80 = 42,051,214.40/x
  3. Step 3: Cross multiply
    128,309,993.60x = 192,463,240.80 × 42,051,214.40
  4. Step 4: Simplify right side
    128,309,993.60x = 8,093,313,002,999,628
  5. Step 5: Solve for x
    x = 8,093,313,002,999,628/128,309,993.60
  6. Step 6: Final answer
    x = 63,076,248.20

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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.