Home / 90,695.20-136,042.80-89,820.40

Finding the Fourth Proportional to 90,695.20, 136,042.80 and 89,820.40

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Solution

The fourth proportional to 90,695.20, 136,042.80 and 89,820.40 is: 134,730.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,695.20 : 136,042.80 = 89,820.40 : x
  2. Step 2: Convert to fraction form
    90,695.20/136,042.80 = 89,820.40/x
  3. Step 3: Cross multiply
    90,695.20x = 136,042.80 × 89,820.40
  4. Step 4: Simplify right side
    90,695.20x = 12,219,418,713.12
  5. Step 5: Solve for x
    x = 12,219,418,713.12/90,695.20
  6. Step 6: Final answer
    x = 134,730.60

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1.5x scale

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.