Home / 78,510.12-108,344.52-42,701.28

Finding the Fourth Proportional to 78,510.12, 108,344.52 and 42,701.28

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Solution

The fourth proportional to 78,510.12, 108,344.52 and 42,701.28 is: 58,928.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,510.12 : 108,344.52 = 42,701.28 : x
  2. Step 2: Convert to fraction form
    78,510.12/108,344.52 = 42,701.28/x
  3. Step 3: Cross multiply
    78,510.12x = 108,344.52 × 42,701.28
  4. Step 4: Simplify right side
    78,510.12x = 4,626,449,684.99
  5. Step 5: Solve for x
    x = 4,626,449,684.99/78,510.12
  6. Step 6: Final answer
    x = 58,928.07

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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.