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Finding the Fourth Proportional to 122,643.72, 169,254.36 and 74,889.36

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Solution

The fourth proportional to 122,643.72, 169,254.36 and 74,889.36 is: 103,351.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,643.72 : 169,254.36 = 74,889.36 : x
  2. Step 2: Convert to fraction form
    122,643.72/169,254.36 = 74,889.36/x
  3. Step 3: Cross multiply
    122,643.72x = 169,254.36 × 74,889.36
  4. Step 4: Simplify right side
    122,643.72x = 12,675,350,697.61
  5. Step 5: Solve for x
    x = 12,675,350,697.61/122,643.72
  6. Step 6: Final answer
    x = 103,351.00

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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.