Home / 109,729.70-151,424.79-61,985.06

Finding the Fourth Proportional to 109,729.70, 151,424.79 and 61,985.06

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Solution

The fourth proportional to 109,729.70, 151,424.79 and 61,985.06 is: 85,538.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,729.70 : 151,424.79 = 61,985.06 : x
  2. Step 2: Convert to fraction form
    109,729.70/151,424.79 = 61,985.06/x
  3. Step 3: Cross multiply
    109,729.70x = 151,424.79 × 61,985.06
  4. Step 4: Simplify right side
    109,729.70x = 9,386,074,693.64
  5. Step 5: Solve for x
    x = 9,386,074,693.64/109,729.70
  6. Step 6: Final answer
    x = 85,538.14

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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.