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Finding the Fourth Proportional to 261,063.60, 391,336.20 and 120,577.20

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Solution

The fourth proportional to 261,063.60, 391,336.20 and 120,577.20 is: 180,746.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,063.60 : 391,336.20 = 120,577.20 : x
  2. Step 2: Convert to fraction form
    261,063.60/391,336.20 = 120,577.20/x
  3. Step 3: Cross multiply
    261,063.60x = 391,336.20 × 120,577.20
  4. Step 4: Simplify right side
    261,063.60x = 47,186,223,254.64
  5. Step 5: Solve for x
    x = 47,186,223,254.64/261,063.60
  6. Step 6: Final answer
    x = 180,746.08

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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.