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Finding the Fourth Proportional to 60,686.76, 91,071.12 and 21,244.20

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Solution

The fourth proportional to 60,686.76, 91,071.12 and 21,244.20 is: 31,880.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,686.76 : 91,071.12 = 21,244.20 : x
  2. Step 2: Convert to fraction form
    60,686.76/91,071.12 = 21,244.20/x
  3. Step 3: Cross multiply
    60,686.76x = 91,071.12 × 21,244.20
  4. Step 4: Simplify right side
    60,686.76x = 1,934,733,087.50
  5. Step 5: Solve for x
    x = 1,934,733,087.50/60,686.76
  6. Step 6: Final answer
    x = 31,880.65

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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.