Home / 129,528.80-193,904.40-76,911.20

Finding the Fourth Proportional to 129,528.80, 193,904.40 and 76,911.20

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Solution

The fourth proportional to 129,528.80, 193,904.40 and 76,911.20 is: 115,135.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,528.80 : 193,904.40 = 76,911.20 : x
  2. Step 2: Convert to fraction form
    129,528.80/193,904.40 = 76,911.20/x
  3. Step 3: Cross multiply
    129,528.80x = 193,904.40 × 76,911.20
  4. Step 4: Simplify right side
    129,528.80x = 14,913,420,089.28
  5. Step 5: Solve for x
    x = 14,913,420,089.28/129,528.80
  6. Step 6: Final answer
    x = 115,135.94

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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.