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Finding the Fourth Proportional to 342,363.17, 513,444.38 and 128,977.13

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Solution

The fourth proportional to 342,363.17, 513,444.38 and 128,977.13 is: 193,427.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,363.17 : 513,444.38 = 128,977.13 : x
  2. Step 2: Convert to fraction form
    342,363.17/513,444.38 = 128,977.13/x
  3. Step 3: Cross multiply
    342,363.17x = 513,444.38 × 128,977.13
  4. Step 4: Simplify right side
    342,363.17x = 66,222,579,334.92
  5. Step 5: Solve for x
    x = 66,222,579,334.92/342,363.17
  6. Step 6: Final answer
    x = 193,427.87

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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.