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Finding the Fourth Proportional to 138,901.61, 191,683.59 and 75,239.56

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Solution

The fourth proportional to 138,901.61, 191,683.59 and 75,239.56 is: 103,830.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,901.61 : 191,683.59 = 75,239.56 : x
  2. Step 2: Convert to fraction form
    138,901.61/191,683.59 = 75,239.56/x
  3. Step 3: Cross multiply
    138,901.61x = 191,683.59 × 75,239.56
  4. Step 4: Simplify right side
    138,901.61x = 14,422,188,970.82
  5. Step 5: Solve for x
    x = 14,422,188,970.82/138,901.61
  6. Step 6: Final answer
    x = 103,830.25

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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.