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Finding the Fourth Proportional to 71,455.90, 98,602.68 and 39,624.70

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Solution

The fourth proportional to 71,455.90, 98,602.68 and 39,624.70 is: 54,678.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,455.90 : 98,602.68 = 39,624.70 : x
  2. Step 2: Convert to fraction form
    71,455.90/98,602.68 = 39,624.70/x
  3. Step 3: Cross multiply
    71,455.90x = 98,602.68 × 39,624.70
  4. Step 4: Simplify right side
    71,455.90x = 3,907,101,614.20
  5. Step 5: Solve for x
    x = 3,907,101,614.20/71,455.90
  6. Step 6: Final answer
    x = 54,678.50

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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.