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Finding the Fourth Proportional to 99,519, 137,340.66 and 58,684.77

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Solution

The fourth proportional to 99,519, 137,340.66 and 58,684.77 is: 80,987.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,519 : 137,340.66 = 58,684.77 : x
  2. Step 2: Convert to fraction form
    99,519/137,340.66 = 58,684.77/x
  3. Step 3: Cross multiply
    99,519x = 137,340.66 × 58,684.77
  4. Step 4: Simplify right side
    99,519x = 8,059,805,043.75
  5. Step 5: Solve for x
    x = 8,059,805,043.75/99,519
  6. Step 6: Final answer
    x = 80,987.60

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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.