Home / 109,728.89-151,438.20-61,985.31

Finding the Fourth Proportional to 109,728.89, 151,438.20 and 61,985.31

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Solution

The fourth proportional to 109,728.89, 151,438.20 and 61,985.31 is: 85,546.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,728.89 : 151,438.20 = 61,985.31 : x
  2. Step 2: Convert to fraction form
    109,728.89/151,438.20 = 61,985.31/x
  3. Step 3: Cross multiply
    109,728.89x = 151,438.20 × 61,985.31
  4. Step 4: Simplify right side
    109,728.89x = 9,386,943,772.84
  5. Step 5: Solve for x
    x = 9,386,943,772.84/109,728.89
  6. Step 6: Final answer
    x = 85,546.70

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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.