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Finding the Fourth Proportional to 60,643.80, 90,965.70 and 47,959.20

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Solution

The fourth proportional to 60,643.80, 90,965.70 and 47,959.20 is: 71,938.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,643.80 : 90,965.70 = 47,959.20 : x
  2. Step 2: Convert to fraction form
    60,643.80/90,965.70 = 47,959.20/x
  3. Step 3: Cross multiply
    60,643.80x = 90,965.70 × 47,959.20
  4. Step 4: Simplify right side
    60,643.80x = 4,362,642,199.44
  5. Step 5: Solve for x
    x = 4,362,642,199.44/60,643.80
  6. Step 6: Final answer
    x = 71,938.80

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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.