Home / 78,938.12-108,928.91-43,120.52

Finding the Fourth Proportional to 78,938.12, 108,928.91 and 43,120.52

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Solution

The fourth proportional to 78,938.12, 108,928.91 and 43,120.52 is: 59,503.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,938.12 : 108,928.91 = 43,120.52 : x
  2. Step 2: Convert to fraction form
    78,938.12/108,928.91 = 43,120.52/x
  3. Step 3: Cross multiply
    78,938.12x = 108,928.91 × 43,120.52
  4. Step 4: Simplify right side
    78,938.12x = 4,697,071,622.36
  5. Step 5: Solve for x
    x = 4,697,071,622.36/78,938.12
  6. Step 6: Final answer
    x = 59,503.21

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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.