Home / 103,612.10-142,979.18-61,155.14

Finding the Fourth Proportional to 103,612.10, 142,979.18 and 61,155.14

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Solution

The fourth proportional to 103,612.10, 142,979.18 and 61,155.14 is: 84,390.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,612.10 : 142,979.18 = 61,155.14 : x
  2. Step 2: Convert to fraction form
    103,612.10/142,979.18 = 61,155.14/x
  3. Step 3: Cross multiply
    103,612.10x = 142,979.18 × 61,155.14
  4. Step 4: Simplify right side
    103,612.10x = 8,743,911,769.99
  5. Step 5: Solve for x
    x = 8,743,911,769.99/103,612.10
  6. Step 6: Final answer
    x = 84,390.84

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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.