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Finding the Fourth Proportional to 86,615.40, 129,966.30 and 49,204.20

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Solution

The fourth proportional to 86,615.40, 129,966.30 and 49,204.20 is: 73,830.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,615.40 : 129,966.30 = 49,204.20 : x
  2. Step 2: Convert to fraction form
    86,615.40/129,966.30 = 49,204.20/x
  3. Step 3: Cross multiply
    86,615.40x = 129,966.30 × 49,204.20
  4. Step 4: Simplify right side
    86,615.40x = 6,394,887,818.46
  5. Step 5: Solve for x
    x = 6,394,887,818.46/86,615.40
  6. Step 6: Final answer
    x = 73,830.84

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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.