Home / 90,638.10-135,957.15-69,618.60

Finding the Fourth Proportional to 90,638.10, 135,957.15 and 69,618.60

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Solution

The fourth proportional to 90,638.10, 135,957.15 and 69,618.60 is: 104,427.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,638.10 : 135,957.15 = 69,618.60 : x
  2. Step 2: Convert to fraction form
    90,638.10/135,957.15 = 69,618.60/x
  3. Step 3: Cross multiply
    90,638.10x = 135,957.15 × 69,618.60
  4. Step 4: Simplify right side
    90,638.10x = 9,465,146,442.99
  5. Step 5: Solve for x
    x = 9,465,146,442.99/90,638.10
  6. Step 6: Final answer
    x = 104,427.90

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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.