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Finding the Fourth Proportional to 145,417.92, 218,129.61 and 45,575.90

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Solution

The fourth proportional to 145,417.92, 218,129.61 and 45,575.90 is: 68,364.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,417.92 : 218,129.61 = 45,575.90 : x
  2. Step 2: Convert to fraction form
    145,417.92/218,129.61 = 45,575.90/x
  3. Step 3: Cross multiply
    145,417.92x = 218,129.61 × 45,575.90
  4. Step 4: Simplify right side
    145,417.92x = 9,941,453,292.40
  5. Step 5: Solve for x
    x = 9,941,453,292.40/145,417.92
  6. Step 6: Final answer
    x = 68,364.71

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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.