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Finding the Fourth Proportional to 111,320.46, 153,825.65 and 81,053.06

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Solution

The fourth proportional to 111,320.46, 153,825.65 and 81,053.06 is: 112,001.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,320.46 : 153,825.65 = 81,053.06 : x
  2. Step 2: Convert to fraction form
    111,320.46/153,825.65 = 81,053.06/x
  3. Step 3: Cross multiply
    111,320.46x = 153,825.65 × 81,053.06
  4. Step 4: Simplify right side
    111,320.46x = 12,468,038,768.54
  5. Step 5: Solve for x
    x = 12,468,038,768.54/111,320.46
  6. Step 6: Final answer
    x = 112,001.32

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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.