Home / 138,020.64-190,468.52-77,591.40

Finding the Fourth Proportional to 138,020.64, 190,468.52 and 77,591.40

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Solution

The fourth proportional to 138,020.64, 190,468.52 and 77,591.40 is: 107,076.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,020.64 : 190,468.52 = 77,591.40 : x
  2. Step 2: Convert to fraction form
    138,020.64/190,468.52 = 77,591.40/x
  3. Step 3: Cross multiply
    138,020.64x = 190,468.52 × 77,591.40
  4. Step 4: Simplify right side
    138,020.64x = 14,778,718,734.77
  5. Step 5: Solve for x
    x = 14,778,718,734.77/138,020.64
  6. Step 6: Final answer
    x = 107,076.15

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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.