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Finding the Fourth Proportional to 124,866, 172,315.80 and 80,154

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Solution

The fourth proportional to 124,866, 172,315.80 and 80,154 is: 110,612.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,866 : 172,315.80 = 80,154 : x
  2. Step 2: Convert to fraction form
    124,866/172,315.80 = 80,154/x
  3. Step 3: Cross multiply
    124,866x = 172,315.80 × 80,154
  4. Step 4: Simplify right side
    124,866x = 13,811,800,633.20
  5. Step 5: Solve for x
    x = 13,811,800,633.20/124,866
  6. Step 6: Final answer
    x = 110,612.98

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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.