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Finding the Fourth Proportional to 218,779.88, 328,225.16 and 61,008.35

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Solution

The fourth proportional to 218,779.88, 328,225.16 and 61,008.35 is: 91,527.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,779.88 : 328,225.16 = 61,008.35 : x
  2. Step 2: Convert to fraction form
    218,779.88/328,225.16 = 61,008.35/x
  3. Step 3: Cross multiply
    218,779.88x = 328,225.16 × 61,008.35
  4. Step 4: Simplify right side
    218,779.88x = 20,024,473,951.48
  5. Step 5: Solve for x
    x = 20,024,473,951.48/218,779.88
  6. Step 6: Final answer
    x = 91,527.95

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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.