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Finding the Fourth Proportional to 60,761.80, 91,142.70 and 21,322.90

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Solution

The fourth proportional to 60,761.80, 91,142.70 and 21,322.90 is: 31,984.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,761.80 : 91,142.70 = 21,322.90 : x
  2. Step 2: Convert to fraction form
    60,761.80/91,142.70 = 21,322.90/x
  3. Step 3: Cross multiply
    60,761.80x = 91,142.70 × 21,322.90
  4. Step 4: Simplify right side
    60,761.80x = 1,943,426,677.83
  5. Step 5: Solve for x
    x = 1,943,426,677.83/60,761.80
  6. Step 6: Final answer
    x = 31,984.35

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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.