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Finding the Fourth Proportional to 64,415, 88,892.70 and 39,279.08

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Solution

The fourth proportional to 64,415, 88,892.70 and 39,279.08 is: 54,205.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,415 : 88,892.70 = 39,279.08 : x
  2. Step 2: Convert to fraction form
    64,415/88,892.70 = 39,279.08/x
  3. Step 3: Cross multiply
    64,415x = 88,892.70 × 39,279.08
  4. Step 4: Simplify right side
    64,415x = 3,491,623,474.72
  5. Step 5: Solve for x
    x = 3,491,623,474.72/64,415
  6. Step 6: Final answer
    x = 54,205.13

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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.