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Finding the Fourth Proportional to 144,430.10, 216,773.15 and 85,191.70

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Solution

The fourth proportional to 144,430.10, 216,773.15 and 85,191.70 is: 127,863.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,430.10 : 216,773.15 = 85,191.70 : x
  2. Step 2: Convert to fraction form
    144,430.10/216,773.15 = 85,191.70/x
  3. Step 3: Cross multiply
    144,430.10x = 216,773.15 × 85,191.70
  4. Step 4: Simplify right side
    144,430.10x = 18,467,273,162.86
  5. Step 5: Solve for x
    x = 18,467,273,162.86/144,430.10
  6. Step 6: Final answer
    x = 127,863.05

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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.