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Finding the Fourth Proportional to 122,633.86, 169,235.32 and 71,649.50

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Solution

The fourth proportional to 122,633.86, 169,235.32 and 71,649.50 is: 98,876.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,633.86 : 169,235.32 = 71,649.50 : x
  2. Step 2: Convert to fraction form
    122,633.86/169,235.32 = 71,649.50/x
  3. Step 3: Cross multiply
    122,633.86x = 169,235.32 × 71,649.50
  4. Step 4: Simplify right side
    122,633.86x = 12,125,626,060.34
  5. Step 5: Solve for x
    x = 12,125,626,060.34/122,633.86
  6. Step 6: Final answer
    x = 98,876.66

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1.5x scale

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.