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Finding the Fourth Proportional to 122,987.52, 183,431.16 and 104,389.92

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Solution

The fourth proportional to 122,987.52, 183,431.16 and 104,389.92 is: 155,693.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,987.52 : 183,431.16 = 104,389.92 : x
  2. Step 2: Convert to fraction form
    122,987.52/183,431.16 = 104,389.92/x
  3. Step 3: Cross multiply
    122,987.52x = 183,431.16 × 104,389.92
  4. Step 4: Simplify right side
    122,987.52x = 19,148,364,117.91
  5. Step 5: Solve for x
    x = 19,148,364,117.91/122,987.52
  6. Step 6: Final answer
    x = 155,693.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.