Home / 156,621.28-216,139.44-85,002.16

Finding the Fourth Proportional to 156,621.28, 216,139.44 and 85,002.16

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Solution

The fourth proportional to 156,621.28, 216,139.44 and 85,002.16 is: 117,304.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,621.28 : 216,139.44 = 85,002.16 : x
  2. Step 2: Convert to fraction form
    156,621.28/216,139.44 = 85,002.16/x
  3. Step 3: Cross multiply
    156,621.28x = 216,139.44 × 85,002.16
  4. Step 4: Simplify right side
    156,621.28x = 18,372,319,261.19
  5. Step 5: Solve for x
    x = 18,372,319,261.19/156,621.28
  6. Step 6: Final answer
    x = 117,304.11

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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.