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Finding the Fourth Proportional to 111,482.70, 153,781.79 and 71,151.01

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Solution

The fourth proportional to 111,482.70, 153,781.79 and 71,151.01 is: 98,147.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,482.70 : 153,781.79 = 71,151.01 : x
  2. Step 2: Convert to fraction form
    111,482.70/153,781.79 = 71,151.01/x
  3. Step 3: Cross multiply
    111,482.70x = 153,781.79 × 71,151.01
  4. Step 4: Simplify right side
    111,482.70x = 10,941,729,678.11
  5. Step 5: Solve for x
    x = 10,941,729,678.11/111,482.70
  6. Step 6: Final answer
    x = 98,147.33

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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.