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Finding the Fourth Proportional to 75,420.60, 113,130.90 and 40,342.20

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Solution

The fourth proportional to 75,420.60, 113,130.90 and 40,342.20 is: 60,513.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,420.60 : 113,130.90 = 40,342.20 : x
  2. Step 2: Convert to fraction form
    75,420.60/113,130.90 = 40,342.20/x
  3. Step 3: Cross multiply
    75,420.60x = 113,130.90 × 40,342.20
  4. Step 4: Simplify right side
    75,420.60x = 4,563,949,393.98
  5. Step 5: Solve for x
    x = 4,563,949,393.98/75,420.60
  6. Step 6: Final answer
    x = 60,513.30

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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.