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Finding the Fourth Proportional to 261,036.60, 391,295.70 and 120,550.20

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Solution

The fourth proportional to 261,036.60, 391,295.70 and 120,550.20 is: 180,705.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,036.60 : 391,295.70 = 120,550.20 : x
  2. Step 2: Convert to fraction form
    261,036.60/391,295.70 = 120,550.20/x
  3. Step 3: Cross multiply
    261,036.60x = 391,295.70 × 120,550.20
  4. Step 4: Simplify right side
    261,036.60x = 47,170,774,894.14
  5. Step 5: Solve for x
    x = 47,170,774,894.14/261,036.60
  6. Step 6: Final answer
    x = 180,705.60

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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.