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Finding the Fourth Proportional to 138,416.40, 207,624.60 and 68,432.40

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Solution

The fourth proportional to 138,416.40, 207,624.60 and 68,432.40 is: 102,648.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,416.40 : 207,624.60 = 68,432.40 : x
  2. Step 2: Convert to fraction form
    138,416.40/207,624.60 = 68,432.40/x
  3. Step 3: Cross multiply
    138,416.40x = 207,624.60 × 68,432.40
  4. Step 4: Simplify right side
    138,416.40x = 14,208,249,677.04
  5. Step 5: Solve for x
    x = 14,208,249,677.04/138,416.40
  6. Step 6: Final answer
    x = 102,648.60

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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.