Home / 115,045.49-158,811.77-77,341.61

Finding the Fourth Proportional to 115,045.49, 158,811.77 and 77,341.61

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Solution

The fourth proportional to 115,045.49, 158,811.77 and 77,341.61 is: 106,764.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,045.49 : 158,811.77 = 77,341.61 : x
  2. Step 2: Convert to fraction form
    115,045.49/158,811.77 = 77,341.61/x
  3. Step 3: Cross multiply
    115,045.49x = 158,811.77 × 77,341.61
  4. Step 4: Simplify right side
    115,045.49x = 12,282,757,978.75
  5. Step 5: Solve for x
    x = 12,282,757,978.75/115,045.49
  6. Step 6: Final answer
    x = 106,764.36

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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.