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Finding the Fourth Proportional to 90,472.01, 135,708.02 and 61,980.86

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Solution

The fourth proportional to 90,472.01, 135,708.02 and 61,980.86 is: 92,971.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,472.01 : 135,708.02 = 61,980.86 : x
  2. Step 2: Convert to fraction form
    90,472.01/135,708.02 = 61,980.86/x
  3. Step 3: Cross multiply
    90,472.01x = 135,708.02 × 61,980.86
  4. Step 4: Simplify right side
    90,472.01x = 8,411,300,050.29
  5. Step 5: Solve for x
    x = 8,411,300,050.29/90,472.01
  6. Step 6: Final answer
    x = 92,971.30

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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.