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Finding the Fourth Proportional to 105,081.71, 145,015.41 and 57,335.85

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Solution

The fourth proportional to 105,081.71, 145,015.41 and 57,335.85 is: 79,124.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,081.71 : 145,015.41 = 57,335.85 : x
  2. Step 2: Convert to fraction form
    105,081.71/145,015.41 = 57,335.85/x
  3. Step 3: Cross multiply
    105,081.71x = 145,015.41 × 57,335.85
  4. Step 4: Simplify right side
    105,081.71x = 8,314,582,010.46
  5. Step 5: Solve for x
    x = 8,314,582,010.46/105,081.71
  6. Step 6: Final answer
    x = 79,124.92

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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.