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Finding the Fourth Proportional to 261,030.30, 391,545.45 and 121,062.30

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Solution

The fourth proportional to 261,030.30, 391,545.45 and 121,062.30 is: 181,593.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,030.30 : 391,545.45 = 121,062.30 : x
  2. Step 2: Convert to fraction form
    261,030.30/391,545.45 = 121,062.30/x
  3. Step 3: Cross multiply
    261,030.30x = 391,545.45 × 121,062.30
  4. Step 4: Simplify right side
    261,030.30x = 47,401,392,731.54
  5. Step 5: Solve for x
    x = 47,401,392,731.54/261,030.30
  6. Step 6: Final answer
    x = 181,593.45

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1.5x scale

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.