Home / 129,875.51-179,226.45-72,515.71

Finding the Fourth Proportional to 129,875.51, 179,226.45 and 72,515.71

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Solution

The fourth proportional to 129,875.51, 179,226.45 and 72,515.71 is: 100,070.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,875.51 : 179,226.45 = 72,515.71 : x
  2. Step 2: Convert to fraction form
    129,875.51/179,226.45 = 72,515.71/x
  3. Step 3: Cross multiply
    129,875.51x = 179,226.45 × 72,515.71
  4. Step 4: Simplify right side
    129,875.51x = 12,996,733,272.53
  5. Step 5: Solve for x
    x = 12,996,733,272.53/129,875.51
  6. Step 6: Final answer
    x = 100,070.70

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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.