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Finding the Fourth Proportional to 161,779.52, 223,262.19 and 90,158.90

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Solution

The fourth proportional to 161,779.52, 223,262.19 and 90,158.90 is: 124,422.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,779.52 : 223,262.19 = 90,158.90 : x
  2. Step 2: Convert to fraction form
    161,779.52/223,262.19 = 90,158.90/x
  3. Step 3: Cross multiply
    161,779.52x = 223,262.19 × 90,158.90
  4. Step 4: Simplify right side
    161,779.52x = 20,129,073,461.99
  5. Step 5: Solve for x
    x = 20,129,073,461.99/161,779.52
  6. Step 6: Final answer
    x = 124,422.88

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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.