Home / 105,366.14-145,458.15-81,438.74

Finding the Fourth Proportional to 105,366.14, 145,458.15 and 81,438.74

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Solution

The fourth proportional to 105,366.14, 145,458.15 and 81,438.74 is: 112,426.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,366.14 : 145,458.15 = 81,438.74 : x
  2. Step 2: Convert to fraction form
    105,366.14/145,458.15 = 81,438.74/x
  3. Step 3: Cross multiply
    105,366.14x = 145,458.15 × 81,438.74
  4. Step 4: Simplify right side
    105,366.14x = 11,845,928,458.73
  5. Step 5: Solve for x
    x = 11,845,928,458.73/105,366.14
  6. Step 6: Final answer
    x = 112,426.33

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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.