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Finding the Fourth Proportional to 60,978.12, 91,467.18 and 40,196.76

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Solution

The fourth proportional to 60,978.12, 91,467.18 and 40,196.76 is: 60,295.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,978.12 : 91,467.18 = 40,196.76 : x
  2. Step 2: Convert to fraction form
    60,978.12/91,467.18 = 40,196.76/x
  3. Step 3: Cross multiply
    60,978.12x = 91,467.18 × 40,196.76
  4. Step 4: Simplify right side
    60,978.12x = 3,676,684,158.90
  5. Step 5: Solve for x
    x = 3,676,684,158.90/60,978.12
  6. Step 6: Final answer
    x = 60,295.14

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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.