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Finding the Fourth Proportional to 66,342.71, 91,538.12 and 55,630.91

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Solution

The fourth proportional to 66,342.71, 91,538.12 and 55,630.91 is: 76,758.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,342.71 : 91,538.12 = 55,630.91 : x
  2. Step 2: Convert to fraction form
    66,342.71/91,538.12 = 55,630.91/x
  3. Step 3: Cross multiply
    66,342.71x = 91,538.12 × 55,630.91
  4. Step 4: Simplify right side
    66,342.71x = 5,092,348,637.13
  5. Step 5: Solve for x
    x = 5,092,348,637.13/66,342.71
  6. Step 6: Final answer
    x = 76,758.22

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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.