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Finding the Fourth Proportional to 122,117.60, 183,176.40 and 84,719.90

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Solution

The fourth proportional to 122,117.60, 183,176.40 and 84,719.90 is: 127,079.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,117.60 : 183,176.40 = 84,719.90 : x
  2. Step 2: Convert to fraction form
    122,117.60/183,176.40 = 84,719.90/x
  3. Step 3: Cross multiply
    122,117.60x = 183,176.40 × 84,719.90
  4. Step 4: Simplify right side
    122,117.60x = 15,518,686,290.36
  5. Step 5: Solve for x
    x = 15,518,686,290.36/122,117.60
  6. Step 6: Final answer
    x = 127,079.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.