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Finding the Fourth Proportional to 128,207.16, 176,929.56 and 71,617.32

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Solution

The fourth proportional to 128,207.16, 176,929.56 and 71,617.32 is: 98,833.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,207.16 : 176,929.56 = 71,617.32 : x
  2. Step 2: Convert to fraction form
    128,207.16/176,929.56 = 71,617.32/x
  3. Step 3: Cross multiply
    128,207.16x = 176,929.56 × 71,617.32
  4. Step 4: Simplify right side
    128,207.16x = 12,671,220,915.98
  5. Step 5: Solve for x
    x = 12,671,220,915.98/128,207.16
  6. Step 6: Final answer
    x = 98,833.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.