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Finding the Fourth Proportional to 84,809.70, 127,130.85 and 47,387.70

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Solution

The fourth proportional to 84,809.70, 127,130.85 and 47,387.70 is: 71,034.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,809.70 : 127,130.85 = 47,387.70 : x
  2. Step 2: Convert to fraction form
    84,809.70/127,130.85 = 47,387.70/x
  3. Step 3: Cross multiply
    84,809.70x = 127,130.85 × 47,387.70
  4. Step 4: Simplify right side
    84,809.70x = 6,024,438,580.55
  5. Step 5: Solve for x
    x = 6,024,438,580.55/84,809.70
  6. Step 6: Final answer
    x = 71,034.78

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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.