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Finding the Fourth Proportional to 261,050.88, 391,384.80 and 83,455.68

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Solution

The fourth proportional to 261,050.88, 391,384.80 and 83,455.68 is: 125,122.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,050.88 : 391,384.80 = 83,455.68 : x
  2. Step 2: Convert to fraction form
    261,050.88/391,384.80 = 83,455.68/x
  3. Step 3: Cross multiply
    261,050.88x = 391,384.80 × 83,455.68
  4. Step 4: Simplify right side
    261,050.88x = 32,663,284,625.66
  5. Step 5: Solve for x
    x = 32,663,284,625.66/261,050.88
  6. Step 6: Final answer
    x = 125,122.29

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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.