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Finding the Fourth Proportional to 60,399.60, 90,696.60 and 40,765.20

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Solution

The fourth proportional to 60,399.60, 90,696.60 and 40,765.20 is: 61,213.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,399.60 : 90,696.60 = 40,765.20 : x
  2. Step 2: Convert to fraction form
    60,399.60/90,696.60 = 40,765.20/x
  3. Step 3: Cross multiply
    60,399.60x = 90,696.60 × 40,765.20
  4. Step 4: Simplify right side
    60,399.60x = 3,697,265,038.32
  5. Step 5: Solve for x
    x = 3,697,265,038.32/60,399.60
  6. Step 6: Final answer
    x = 61,213.40

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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.