Home / 66,188.16-91,331.52-39,331.20

Finding the Fourth Proportional to 66,188.16, 91,331.52 and 39,331.20

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Solution

The fourth proportional to 66,188.16, 91,331.52 and 39,331.20 is: 54,272.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,188.16 : 91,331.52 = 39,331.20 : x
  2. Step 2: Convert to fraction form
    66,188.16/91,331.52 = 39,331.20/x
  3. Step 3: Cross multiply
    66,188.16x = 91,331.52 × 39,331.20
  4. Step 4: Simplify right side
    66,188.16x = 3,592,178,279.42
  5. Step 5: Solve for x
    x = 3,592,178,279.42/66,188.16
  6. Step 6: Final answer
    x = 54,272.22

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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.