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Finding the Fourth Proportional to 143,830.29, 215,798.03 and 66,929.95

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Solution

The fourth proportional to 143,830.29, 215,798.03 and 66,929.95 is: 100,419.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,830.29 : 215,798.03 = 66,929.95 : x
  2. Step 2: Convert to fraction form
    143,830.29/215,798.03 = 66,929.95/x
  3. Step 3: Cross multiply
    143,830.29x = 215,798.03 × 66,929.95
  4. Step 4: Simplify right side
    143,830.29x = 14,443,351,562.84
  5. Step 5: Solve for x
    x = 14,443,351,562.84/143,830.29
  6. Step 6: Final answer
    x = 100,419.40

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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.