Home / 81,026.28-121,557.39-31,106.39

Finding the Fourth Proportional to 81,026.28, 121,557.39 and 31,106.39

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Solution

The fourth proportional to 81,026.28, 121,557.39 and 31,106.39 is: 46,666.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,026.28 : 121,557.39 = 31,106.39 : x
  2. Step 2: Convert to fraction form
    81,026.28/121,557.39 = 31,106.39/x
  3. Step 3: Cross multiply
    81,026.28x = 121,557.39 × 31,106.39
  4. Step 4: Simplify right side
    81,026.28x = 3,781,210,972.94
  5. Step 5: Solve for x
    x = 3,781,210,972.94/81,026.28
  6. Step 6: Final answer
    x = 46,666.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.