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Finding the Fourth Proportional to 72,011.57, 99,393.71 and 43,740.95

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Solution

The fourth proportional to 72,011.57, 99,393.71 and 43,740.95 is: 60,373.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,011.57 : 99,393.71 = 43,740.95 : x
  2. Step 2: Convert to fraction form
    72,011.57/99,393.71 = 43,740.95/x
  3. Step 3: Cross multiply
    72,011.57x = 99,393.71 × 43,740.95
  4. Step 4: Simplify right side
    72,011.57x = 4,347,574,583.75
  5. Step 5: Solve for x
    x = 4,347,574,583.75/72,011.57
  6. Step 6: Final answer
    x = 60,373.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.