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Finding the Fourth Proportional to 138,726.54, 191,443.50 and 75,064.19

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Solution

The fourth proportional to 138,726.54, 191,443.50 and 75,064.19 is: 103,589.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,726.54 : 191,443.50 = 75,064.19 : x
  2. Step 2: Convert to fraction form
    138,726.54/191,443.50 = 75,064.19/x
  3. Step 3: Cross multiply
    138,726.54x = 191,443.50 × 75,064.19
  4. Step 4: Simplify right side
    138,726.54x = 14,370,550,301.05
  5. Step 5: Solve for x
    x = 14,370,550,301.05/138,726.54
  6. Step 6: Final answer
    x = 103,589.05

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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.