Home / 138,009.82-190,432.20-77,569.24

Finding the Fourth Proportional to 138,009.82, 190,432.20 and 77,569.24

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Solution

The fourth proportional to 138,009.82, 190,432.20 and 77,569.24 is: 107,033.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,009.82 : 190,432.20 = 77,569.24 : x
  2. Step 2: Convert to fraction form
    138,009.82/190,432.20 = 77,569.24/x
  3. Step 3: Cross multiply
    138,009.82x = 190,432.20 × 77,569.24
  4. Step 4: Simplify right side
    138,009.82x = 14,771,681,025.53
  5. Step 5: Solve for x
    x = 14,771,681,025.53/138,009.82
  6. Step 6: Final answer
    x = 107,033.55

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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.