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Finding the Fourth Proportional to 261,064.87, 391,597.61 and 71,526.88

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Solution

The fourth proportional to 261,064.87, 391,597.61 and 71,526.88 is: 107,290.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,064.87 : 391,597.61 = 71,526.88 : x
  2. Step 2: Convert to fraction form
    261,064.87/391,597.61 = 71,526.88/x
  3. Step 3: Cross multiply
    261,064.87x = 391,597.61 × 71,526.88
  4. Step 4: Simplify right side
    261,064.87x = 28,009,755,258.76
  5. Step 5: Solve for x
    x = 28,009,755,258.76/261,064.87
  6. Step 6: Final answer
    x = 107,290.40

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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.