Home / 111,988.13-154,543.61-61,687.13

Finding the Fourth Proportional to 111,988.13, 154,543.61 and 61,687.13

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Solution

The fourth proportional to 111,988.13, 154,543.61 and 61,687.13 is: 85,128.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,988.13 : 154,543.61 = 61,687.13 : x
  2. Step 2: Convert to fraction form
    111,988.13/154,543.61 = 61,687.13/x
  3. Step 3: Cross multiply
    111,988.13x = 154,543.61 × 61,687.13
  4. Step 4: Simplify right side
    111,988.13x = 9,533,351,142.24
  5. Step 5: Solve for x
    x = 9,533,351,142.24/111,988.13
  6. Step 6: Final answer
    x = 85,128.23

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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.