Home / 90,921.60-136,382.40-28,611.20

Finding the Fourth Proportional to 90,921.60, 136,382.40 and 28,611.20

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Solution

The fourth proportional to 90,921.60, 136,382.40 and 28,611.20 is: 42,916.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,921.60 : 136,382.40 = 28,611.20 : x
  2. Step 2: Convert to fraction form
    90,921.60/136,382.40 = 28,611.20/x
  3. Step 3: Cross multiply
    90,921.60x = 136,382.40 × 28,611.20
  4. Step 4: Simplify right side
    90,921.60x = 3,902,064,122.88
  5. Step 5: Solve for x
    x = 3,902,064,122.88/90,921.60
  6. Step 6: Final answer
    x = 42,916.80

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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.