Home / 100,710.90-138,970.14-58,261.50

Finding the Fourth Proportional to 100,710.90, 138,970.14 and 58,261.50

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Solution

The fourth proportional to 100,710.90, 138,970.14 and 58,261.50 is: 80,394.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,710.90 : 138,970.14 = 58,261.50 : x
  2. Step 2: Convert to fraction form
    100,710.90/138,970.14 = 58,261.50/x
  3. Step 3: Cross multiply
    100,710.90x = 138,970.14 × 58,261.50
  4. Step 4: Simplify right side
    100,710.90x = 8,096,608,811.61
  5. Step 5: Solve for x
    x = 8,096,608,811.61/100,710.90
  6. Step 6: Final answer
    x = 80,394.56

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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.