Home / 105,456.25-145,524.95-57,711.61

Finding the Fourth Proportional to 105,456.25, 145,524.95 and 57,711.61

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Solution

The fourth proportional to 105,456.25, 145,524.95 and 57,711.61 is: 79,639.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,456.25 : 145,524.95 = 57,711.61 : x
  2. Step 2: Convert to fraction form
    105,456.25/145,524.95 = 57,711.61/x
  3. Step 3: Cross multiply
    105,456.25x = 145,524.95 × 57,711.61
  4. Step 4: Simplify right side
    105,456.25x = 8,398,478,143.49
  5. Step 5: Solve for x
    x = 8,398,478,143.49/105,456.25
  6. Step 6: Final answer
    x = 79,639.46

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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.