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Finding the Fourth Proportional to 67,388.40, 101,165.80 and 42,428.40

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Solution

The fourth proportional to 67,388.40, 101,165.80 and 42,428.40 is: 63,694.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,388.40 : 101,165.80 = 42,428.40 : x
  2. Step 2: Convert to fraction form
    67,388.40/101,165.80 = 42,428.40/x
  3. Step 3: Cross multiply
    67,388.40x = 101,165.80 × 42,428.40
  4. Step 4: Simplify right side
    67,388.40x = 4,292,303,028.72
  5. Step 5: Solve for x
    x = 4,292,303,028.72/67,388.40
  6. Step 6: Final answer
    x = 63,694.98

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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.