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Finding the Fourth Proportional to 122,970.59, 169,711.51 and 71,980.22

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Solution

The fourth proportional to 122,970.59, 169,711.51 and 71,980.22 is: 99,339.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,970.59 : 169,711.51 = 71,980.22 : x
  2. Step 2: Convert to fraction form
    122,970.59/169,711.51 = 71,980.22/x
  3. Step 3: Cross multiply
    122,970.59x = 169,711.51 × 71,980.22
  4. Step 4: Simplify right side
    122,970.59x = 12,215,872,070.66
  5. Step 5: Solve for x
    x = 12,215,872,070.66/122,970.59
  6. Step 6: Final answer
    x = 99,339.79

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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.