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Finding the Fourth Proportional to 98,870.80, 148,306.92 and 79,124.08

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Solution

The fourth proportional to 98,870.80, 148,306.92 and 79,124.08 is: 118,686.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,870.80 : 148,306.92 = 79,124.08 : x
  2. Step 2: Convert to fraction form
    98,870.80/148,306.92 = 79,124.08/x
  3. Step 3: Cross multiply
    98,870.80x = 148,306.92 × 79,124.08
  4. Step 4: Simplify right side
    98,870.80x = 11,734,648,602.63
  5. Step 5: Solve for x
    x = 11,734,648,602.63/98,870.80
  6. Step 6: Final answer
    x = 118,686.70

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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.