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Finding the Fourth Proportional to 90,602.40, 135,838.80 and 40,641.60

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Solution

The fourth proportional to 90,602.40, 135,838.80 and 40,641.60 is: 60,933.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,602.40 : 135,838.80 = 40,641.60 : x
  2. Step 2: Convert to fraction form
    90,602.40/135,838.80 = 40,641.60/x
  3. Step 3: Cross multiply
    90,602.40x = 135,838.80 × 40,641.60
  4. Step 4: Simplify right side
    90,602.40x = 5,520,706,174.08
  5. Step 5: Solve for x
    x = 5,520,706,174.08/90,602.40
  6. Step 6: Final answer
    x = 60,933.33

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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.