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Finding the Fourth Proportional to 122,862.83, 169,485.68 and 84,555.87

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Solution

The fourth proportional to 122,862.83, 169,485.68 and 84,555.87 is: 116,642.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,862.83 : 169,485.68 = 84,555.87 : x
  2. Step 2: Convert to fraction form
    122,862.83/169,485.68 = 84,555.87/x
  3. Step 3: Cross multiply
    122,862.83x = 169,485.68 × 84,555.87
  4. Step 4: Simplify right side
    122,862.83x = 14,331,008,702.16
  5. Step 5: Solve for x
    x = 14,331,008,702.16/122,862.83
  6. Step 6: Final answer
    x = 116,642.35

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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.