Home / 120,290.64-180,454.18-87,259.95

Finding the Fourth Proportional to 120,290.64, 180,454.18 and 87,259.95

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Solution

The fourth proportional to 120,290.64, 180,454.18 and 87,259.95 is: 130,903.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,290.64 : 180,454.18 = 87,259.95 : x
  2. Step 2: Convert to fraction form
    120,290.64/180,454.18 = 87,259.95/x
  3. Step 3: Cross multiply
    120,290.64x = 180,454.18 × 87,259.95
  4. Step 4: Simplify right side
    120,290.64x = 15,746,422,669.55
  5. Step 5: Solve for x
    x = 15,746,422,669.55/120,290.64
  6. Step 6: Final answer
    x = 130,903.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.