Home / 78,577.18-108,439.16-42,768.48

Finding the Fourth Proportional to 78,577.18, 108,439.16 and 42,768.48

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Solution

The fourth proportional to 78,577.18, 108,439.16 and 42,768.48 is: 59,021.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,577.18 : 108,439.16 = 42,768.48 : x
  2. Step 2: Convert to fraction form
    78,577.18/108,439.16 = 42,768.48/x
  3. Step 3: Cross multiply
    78,577.18x = 108,439.16 × 42,768.48
  4. Step 4: Simplify right side
    78,577.18x = 4,637,778,045.68
  5. Step 5: Solve for x
    x = 4,637,778,045.68/78,577.18
  6. Step 6: Final answer
    x = 59,021.95

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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.