Home / 90,106.40-134,722.20-66,486.80

Finding the Fourth Proportional to 90,106.40, 134,722.20 and 66,486.80

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Solution

The fourth proportional to 90,106.40, 134,722.20 and 66,486.80 is: 99,407.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,106.40 : 134,722.20 = 66,486.80 : x
  2. Step 2: Convert to fraction form
    90,106.40/134,722.20 = 66,486.80/x
  3. Step 3: Cross multiply
    90,106.40x = 134,722.20 × 66,486.80
  4. Step 4: Simplify right side
    90,106.40x = 8,957,247,966.96
  5. Step 5: Solve for x
    x = 8,957,247,966.96/90,106.40
  6. Step 6: Final answer
    x = 99,407.46

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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.