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Finding the Fourth Proportional to 76,207.40, 105,169.54 and 42,672.68

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Solution

The fourth proportional to 76,207.40, 105,169.54 and 42,672.68 is: 58,890.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,207.40 : 105,169.54 = 42,672.68 : x
  2. Step 2: Convert to fraction form
    76,207.40/105,169.54 = 42,672.68/x
  3. Step 3: Cross multiply
    76,207.40x = 105,169.54 × 42,672.68
  4. Step 4: Simplify right side
    76,207.40x = 4,487,866,126.17
  5. Step 5: Solve for x
    x = 4,487,866,126.17/76,207.40
  6. Step 6: Final answer
    x = 58,890.16

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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.