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Finding the Fourth Proportional to 100,703.52, 138,960.09 and 58,254.12

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Solution

The fourth proportional to 100,703.52, 138,960.09 and 58,254.12 is: 80,384.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,703.52 : 138,960.09 = 58,254.12 : x
  2. Step 2: Convert to fraction form
    100,703.52/138,960.09 = 58,254.12/x
  3. Step 3: Cross multiply
    100,703.52x = 138,960.09 × 58,254.12
  4. Step 4: Simplify right side
    100,703.52x = 8,094,997,758.07
  5. Step 5: Solve for x
    x = 8,094,997,758.07/100,703.52
  6. Step 6: Final answer
    x = 80,384.46

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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.