Home / 86,632.20-129,948.30-72,635.40

Finding the Fourth Proportional to 86,632.20, 129,948.30 and 72,635.40

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Solution

The fourth proportional to 86,632.20, 129,948.30 and 72,635.40 is: 108,953.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,632.20 : 129,948.30 = 72,635.40 : x
  2. Step 2: Convert to fraction form
    86,632.20/129,948.30 = 72,635.40/x
  3. Step 3: Cross multiply
    86,632.20x = 129,948.30 × 72,635.40
  4. Step 4: Simplify right side
    86,632.20x = 9,438,846,749.82
  5. Step 5: Solve for x
    x = 9,438,846,749.82/86,632.20
  6. Step 6: Final answer
    x = 108,953.10

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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.