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Finding the Fourth Proportional to 122,259.88, 168,719.09 and 71,307.79

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Solution

The fourth proportional to 122,259.88, 168,719.09 and 71,307.79 is: 98,405.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,259.88 : 168,719.09 = 71,307.79 : x
  2. Step 2: Convert to fraction form
    122,259.88/168,719.09 = 71,307.79/x
  3. Step 3: Cross multiply
    122,259.88x = 168,719.09 × 71,307.79
  4. Step 4: Simplify right side
    122,259.88x = 12,030,984,238.58
  5. Step 5: Solve for x
    x = 12,030,984,238.58/122,259.88
  6. Step 6: Final answer
    x = 98,405.01

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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.