Home / 71,970.60-99,319.86-40,141.55

Finding the Fourth Proportional to 71,970.60, 99,319.86 and 40,141.55

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Solution

The fourth proportional to 71,970.60, 99,319.86 and 40,141.55 is: 55,395.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,970.60 : 99,319.86 = 40,141.55 : x
  2. Step 2: Convert to fraction form
    71,970.60/99,319.86 = 40,141.55/x
  3. Step 3: Cross multiply
    71,970.60x = 99,319.86 × 40,141.55
  4. Step 4: Simplify right side
    71,970.60x = 3,986,853,126.18
  5. Step 5: Solve for x
    x = 3,986,853,126.18/71,970.60
  6. Step 6: Final answer
    x = 55,395.58

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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.