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Finding the Fourth Proportional to 90,025.40, 135,038.10 and 69,030.20

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Solution

The fourth proportional to 90,025.40, 135,038.10 and 69,030.20 is: 103,545.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,025.40 : 135,038.10 = 69,030.20 : x
  2. Step 2: Convert to fraction form
    90,025.40/135,038.10 = 69,030.20/x
  3. Step 3: Cross multiply
    90,025.40x = 135,038.10 × 69,030.20
  4. Step 4: Simplify right side
    90,025.40x = 9,321,707,050.62
  5. Step 5: Solve for x
    x = 9,321,707,050.62/90,025.40
  6. Step 6: Final answer
    x = 103,545.30

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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.