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Finding the Fourth Proportional to 60,666.30, 90,999.45 and 47,981.70

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Solution

The fourth proportional to 60,666.30, 90,999.45 and 47,981.70 is: 71,972.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,666.30 : 90,999.45 = 47,981.70 : x
  2. Step 2: Convert to fraction form
    60,666.30/90,999.45 = 47,981.70/x
  3. Step 3: Cross multiply
    60,666.30x = 90,999.45 × 47,981.70
  4. Step 4: Simplify right side
    60,666.30x = 4,366,308,310.07
  5. Step 5: Solve for x
    x = 4,366,308,310.07/60,666.30
  6. Step 6: Final answer
    x = 71,972.55

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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.