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Finding the Fourth Proportional to 122,870.46, 169,559.55 and 71,918.22

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Solution

The fourth proportional to 122,870.46, 169,559.55 and 71,918.22 is: 99,246.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,870.46 : 169,559.55 = 71,918.22 : x
  2. Step 2: Convert to fraction form
    122,870.46/169,559.55 = 71,918.22/x
  3. Step 3: Cross multiply
    122,870.46x = 169,559.55 × 71,918.22
  4. Step 4: Simplify right side
    122,870.46x = 12,194,421,020.00
  5. Step 5: Solve for x
    x = 12,194,421,020.00/122,870.46
  6. Step 6: Final answer
    x = 99,246.16

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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.