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Finding the Fourth Proportional to 135,700.22, 187,288.72 and 75,290.30

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Solution

The fourth proportional to 135,700.22, 187,288.72 and 75,290.30 is: 103,913.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,700.22 : 187,288.72 = 75,290.30 : x
  2. Step 2: Convert to fraction form
    135,700.22/187,288.72 = 75,290.30/x
  3. Step 3: Cross multiply
    135,700.22x = 187,288.72 × 75,290.30
  4. Step 4: Simplify right side
    135,700.22x = 14,101,023,915.42
  5. Step 5: Solve for x
    x = 14,101,023,915.42/135,700.22
  6. Step 6: Final answer
    x = 103,913.05

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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.