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Finding the Fourth Proportional to 128,246.40, 192,466.80 and 83,858.40

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Solution

The fourth proportional to 128,246.40, 192,466.80 and 83,858.40 is: 125,851.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,246.40 : 192,466.80 = 83,858.40 : x
  2. Step 2: Convert to fraction form
    128,246.40/192,466.80 = 83,858.40/x
  3. Step 3: Cross multiply
    128,246.40x = 192,466.80 × 83,858.40
  4. Step 4: Simplify right side
    128,246.40x = 16,139,957,901.12
  5. Step 5: Solve for x
    x = 16,139,957,901.12/128,246.40
  6. Step 6: Final answer
    x = 125,851.16

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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.