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Finding the Fourth Proportional to 107,909.58, 148,862.30 and 72,108.40

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Solution

The fourth proportional to 107,909.58, 148,862.30 and 72,108.40 is: 99,474.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,909.58 : 148,862.30 = 72,108.40 : x
  2. Step 2: Convert to fraction form
    107,909.58/148,862.30 = 72,108.40/x
  3. Step 3: Cross multiply
    107,909.58x = 148,862.30 × 72,108.40
  4. Step 4: Simplify right side
    107,909.58x = 10,734,222,273.32
  5. Step 5: Solve for x
    x = 10,734,222,273.32/107,909.58
  6. Step 6: Final answer
    x = 99,474.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.