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Finding the Fourth Proportional to 100,349.64, 138,369 and 64,002.48

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Solution

The fourth proportional to 100,349.64, 138,369 and 64,002.48 is: 88,251.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,349.64 : 138,369 = 64,002.48 : x
  2. Step 2: Convert to fraction form
    100,349.64/138,369 = 64,002.48/x
  3. Step 3: Cross multiply
    100,349.64x = 138,369 × 64,002.48
  4. Step 4: Simplify right side
    100,349.64x = 8,855,959,155.12
  5. Step 5: Solve for x
    x = 8,855,959,155.12/100,349.64
  6. Step 6: Final answer
    x = 88,251.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.