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Finding the Fourth Proportional to 40,281.20, 60,421.80 and 25,312.40

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Solution

The fourth proportional to 40,281.20, 60,421.80 and 25,312.40 is: 37,968.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,281.20 : 60,421.80 = 25,312.40 : x
  2. Step 2: Convert to fraction form
    40,281.20/60,421.80 = 25,312.40/x
  3. Step 3: Cross multiply
    40,281.20x = 60,421.80 × 25,312.40
  4. Step 4: Simplify right side
    40,281.20x = 1,529,420,770.32
  5. Step 5: Solve for x
    x = 1,529,420,770.32/40,281.20
  6. Step 6: Final answer
    x = 37,968.60

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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.