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Finding the Fourth Proportional to 122,220, 168,670.08 and 71,909.28

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Solution

The fourth proportional to 122,220, 168,670.08 and 71,909.28 is: 99,238.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,220 : 168,670.08 = 71,909.28 : x
  2. Step 2: Convert to fraction form
    122,220/168,670.08 = 71,909.28/x
  3. Step 3: Cross multiply
    122,220x = 168,670.08 × 71,909.28
  4. Step 4: Simplify right side
    122,220x = 12,128,944,010.34
  5. Step 5: Solve for x
    x = 12,128,944,010.34/122,220
  6. Step 6: Final answer
    x = 99,238.62

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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.