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Finding the Fourth Proportional to 81,729.66, 112,786.16 and 45,430.16

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Solution

The fourth proportional to 81,729.66, 112,786.16 and 45,430.16 is: 62,693.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,729.66 : 112,786.16 = 45,430.16 : x
  2. Step 2: Convert to fraction form
    81,729.66/112,786.16 = 45,430.16/x
  3. Step 3: Cross multiply
    81,729.66x = 112,786.16 × 45,430.16
  4. Step 4: Simplify right side
    81,729.66x = 5,123,893,294.59
  5. Step 5: Solve for x
    x = 5,123,893,294.59/81,729.66
  6. Step 6: Final answer
    x = 62,693.19

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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.