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Finding the Fourth Proportional to 138,617.83, 191,292.81 and 74,955.63

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Solution

The fourth proportional to 138,617.83, 191,292.81 and 74,955.63 is: 103,438.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,617.83 : 191,292.81 = 74,955.63 : x
  2. Step 2: Convert to fraction form
    138,617.83/191,292.81 = 74,955.63/x
  3. Step 3: Cross multiply
    138,617.83x = 191,292.81 × 74,955.63
  4. Step 4: Simplify right side
    138,617.83x = 14,338,473,088.02
  5. Step 5: Solve for x
    x = 14,338,473,088.02/138,617.83
  6. Step 6: Final answer
    x = 103,438.88

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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.