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Finding the Fourth Proportional to 145,159.13, 217,764.21 and 66,281.33

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Solution

The fourth proportional to 145,159.13, 217,764.21 and 66,281.33 is: 99,433.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,159.13 : 217,764.21 = 66,281.33 : x
  2. Step 2: Convert to fraction form
    145,159.13/217,764.21 = 66,281.33/x
  3. Step 3: Cross multiply
    145,159.13x = 217,764.21 × 66,281.33
  4. Step 4: Simplify right side
    145,159.13x = 14,433,701,465.20
  5. Step 5: Solve for x
    x = 14,433,701,465.20/145,159.13
  6. Step 6: Final answer
    x = 99,433.65

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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.