Home / 129,521.60-178,739.60-72,933.38

Finding the Fourth Proportional to 129,521.60, 178,739.60 and 72,933.38

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Solution

The fourth proportional to 129,521.60, 178,739.60 and 72,933.38 is: 100,647.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,521.60 : 178,739.60 = 72,933.38 : x
  2. Step 2: Convert to fraction form
    129,521.60/178,739.60 = 72,933.38/x
  3. Step 3: Cross multiply
    129,521.60x = 178,739.60 × 72,933.38
  4. Step 4: Simplify right side
    129,521.60x = 13,036,081,909.48
  5. Step 5: Solve for x
    x = 13,036,081,909.48/129,521.60
  6. Step 6: Final answer
    x = 100,647.94

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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.