Home / 71,970.52-99,319.12-40,139.46

Finding the Fourth Proportional to 71,970.52, 99,319.12 and 40,139.46

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Solution

The fourth proportional to 71,970.52, 99,319.12 and 40,139.46 is: 55,392.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,970.52 : 99,319.12 = 40,139.46 : x
  2. Step 2: Convert to fraction form
    71,970.52/99,319.12 = 40,139.46/x
  3. Step 3: Cross multiply
    71,970.52x = 99,319.12 × 40,139.46
  4. Step 4: Simplify right side
    71,970.52x = 3,986,615,844.48
  5. Step 5: Solve for x
    x = 3,986,615,844.48/71,970.52
  6. Step 6: Final answer
    x = 55,392.34

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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.