Home / 78,340.34-108,108-42,530.04

Finding the Fourth Proportional to 78,340.34, 108,108 and 42,530.04

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Solution

The fourth proportional to 78,340.34, 108,108 and 42,530.04 is: 58,690.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,340.34 : 108,108 = 42,530.04 : x
  2. Step 2: Convert to fraction form
    78,340.34/108,108 = 42,530.04/x
  3. Step 3: Cross multiply
    78,340.34x = 108,108 × 42,530.04
  4. Step 4: Simplify right side
    78,340.34x = 4,597,837,564.32
  5. Step 5: Solve for x
    x = 4,597,837,564.32/78,340.34
  6. Step 6: Final answer
    x = 58,690.55

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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.