Home / 261,029.10-391,284.45-120,542.70

Finding the Fourth Proportional to 261,029.10, 391,284.45 and 120,542.70

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Solution

The fourth proportional to 261,029.10, 391,284.45 and 120,542.70 is: 180,694.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,029.10 : 391,284.45 = 120,542.70 : x
  2. Step 2: Convert to fraction form
    261,029.10/391,284.45 = 120,542.70/x
  3. Step 3: Cross multiply
    261,029.10x = 391,284.45 × 120,542.70
  4. Step 4: Simplify right side
    261,029.10x = 47,166,484,071.02
  5. Step 5: Solve for x
    x = 47,166,484,071.02/261,029.10
  6. Step 6: Final answer
    x = 180,694.35

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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.