Home / 129,113.48-178,197.90-75,398.06

Finding the Fourth Proportional to 129,113.48, 178,197.90 and 75,398.06

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Solution

The fourth proportional to 129,113.48, 178,197.90 and 75,398.06 is: 104,061.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,113.48 : 178,197.90 = 75,398.06 : x
  2. Step 2: Convert to fraction form
    129,113.48/178,197.90 = 75,398.06/x
  3. Step 3: Cross multiply
    129,113.48x = 178,197.90 × 75,398.06
  4. Step 4: Simplify right side
    129,113.48x = 13,435,775,956.07
  5. Step 5: Solve for x
    x = 13,435,775,956.07/129,113.48
  6. Step 6: Final answer
    x = 104,061.76

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1.5x scale

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.