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Finding the Fourth Proportional to 100,897.31, 139,238.29 and 58,480.45

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Solution

The fourth proportional to 100,897.31, 139,238.29 and 58,480.45 is: 80,703.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,897.31 : 139,238.29 = 58,480.45 : x
  2. Step 2: Convert to fraction form
    100,897.31/139,238.29 = 58,480.45/x
  3. Step 3: Cross multiply
    100,897.31x = 139,238.29 × 58,480.45
  4. Step 4: Simplify right side
    100,897.31x = 8,142,717,581.44
  5. Step 5: Solve for x
    x = 8,142,717,581.44/100,897.31
  6. Step 6: Final answer
    x = 80,703.02

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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.