Home / 145,959.20-201,423.96-78,891.20

Finding the Fourth Proportional to 145,959.20, 201,423.96 and 78,891.20

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Solution

The fourth proportional to 145,959.20, 201,423.96 and 78,891.20 is: 108,870.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,959.20 : 201,423.96 = 78,891.20 : x
  2. Step 2: Convert to fraction form
    145,959.20/201,423.96 = 78,891.20/x
  3. Step 3: Cross multiply
    145,959.20x = 201,423.96 × 78,891.20
  4. Step 4: Simplify right side
    145,959.20x = 15,890,577,913.15
  5. Step 5: Solve for x
    x = 15,890,577,913.15/145,959.20
  6. Step 6: Final answer
    x = 108,870.00

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1.5x scale

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.