Home / 78,448.03-108,258.95-42,638.04

Finding the Fourth Proportional to 78,448.03, 108,258.95 and 42,638.04

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Solution

The fourth proportional to 78,448.03, 108,258.95 and 42,638.04 is: 58,840.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,448.03 : 108,258.95 = 42,638.04 : x
  2. Step 2: Convert to fraction form
    78,448.03/108,258.95 = 42,638.04/x
  3. Step 3: Cross multiply
    78,448.03x = 108,258.95 × 42,638.04
  4. Step 4: Simplify right side
    78,448.03x = 4,615,948,685.97
  5. Step 5: Solve for x
    x = 4,615,948,685.97/78,448.03
  6. Step 6: Final answer
    x = 58,840.85

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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.