Home / 103,612.39-142,985.31-61,173.65

Finding the Fourth Proportional to 103,612.39, 142,985.31 and 61,173.65

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Solution

The fourth proportional to 103,612.39, 142,985.31 and 61,173.65 is: 84,419.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,612.39 : 142,985.31 = 61,173.65 : x
  2. Step 2: Convert to fraction form
    103,612.39/142,985.31 = 61,173.65/x
  3. Step 3: Cross multiply
    103,612.39x = 142,985.31 × 61,173.65
  4. Step 4: Simplify right side
    103,612.39x = 8,746,933,309.08
  5. Step 5: Solve for x
    x = 8,746,933,309.08/103,612.39
  6. Step 6: Final answer
    x = 84,419.76

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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.