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Finding the Fourth Proportional to 90,807.80, 136,233.48 and 28,478.28

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Solution

The fourth proportional to 90,807.80, 136,233.48 and 28,478.28 is: 42,724.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,807.80 : 136,233.48 = 28,478.28 : x
  2. Step 2: Convert to fraction form
    90,807.80/136,233.48 = 28,478.28/x
  3. Step 3: Cross multiply
    90,807.80x = 136,233.48 × 28,478.28
  4. Step 4: Simplify right side
    90,807.80x = 3,879,695,188.81
  5. Step 5: Solve for x
    x = 3,879,695,188.81/90,807.80
  6. Step 6: Final answer
    x = 42,724.25

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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.