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Finding the Fourth Proportional to 111,129.93, 153,357.75 and 63,384.06

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Solution

The fourth proportional to 111,129.93, 153,357.75 and 63,384.06 is: 87,469.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,129.93 : 153,357.75 = 63,384.06 : x
  2. Step 2: Convert to fraction form
    111,129.93/153,357.75 = 63,384.06/x
  3. Step 3: Cross multiply
    111,129.93x = 153,357.75 × 63,384.06
  4. Step 4: Simplify right side
    111,129.93x = 9,720,436,827.47
  5. Step 5: Solve for x
    x = 9,720,436,827.47/111,129.93
  6. Step 6: Final answer
    x = 87,469.12

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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.