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Finding the Fourth Proportional to 138,064.80, 207,097.20 and 67,929.60

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Solution

The fourth proportional to 138,064.80, 207,097.20 and 67,929.60 is: 101,894.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,064.80 : 207,097.20 = 67,929.60 : x
  2. Step 2: Convert to fraction form
    138,064.80/207,097.20 = 67,929.60/x
  3. Step 3: Cross multiply
    138,064.80x = 207,097.20 × 67,929.60
  4. Step 4: Simplify right side
    138,064.80x = 14,068,029,957.12
  5. Step 5: Solve for x
    x = 14,068,029,957.12/138,064.80
  6. Step 6: Final answer
    x = 101,894.40

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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.