Home / 129,307.10-193,708.45-72,976.81

Finding the Fourth Proportional to 129,307.10, 193,708.45 and 72,976.81

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Solution

The fourth proportional to 129,307.10, 193,708.45 and 72,976.81 is: 109,322.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,307.10 : 193,708.45 = 72,976.81 : x
  2. Step 2: Convert to fraction form
    129,307.10/193,708.45 = 72,976.81/x
  3. Step 3: Cross multiply
    129,307.10x = 193,708.45 × 72,976.81
  4. Step 4: Simplify right side
    129,307.10x = 14,136,224,751.04
  5. Step 5: Solve for x
    x = 14,136,224,751.04/129,307.10
  6. Step 6: Final answer
    x = 109,322.88

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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.