Home / 131,010.16-180,786.12-77,312

Finding the Fourth Proportional to 131,010.16, 180,786.12 and 77,312

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Solution

The fourth proportional to 131,010.16, 180,786.12 and 77,312 is: 106,685.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,010.16 : 180,786.12 = 77,312 : x
  2. Step 2: Convert to fraction form
    131,010.16/180,786.12 = 77,312/x
  3. Step 3: Cross multiply
    131,010.16x = 180,786.12 × 77,312
  4. Step 4: Simplify right side
    131,010.16x = 13,976,936,509.44
  5. Step 5: Solve for x
    x = 13,976,936,509.44/131,010.16
  6. Step 6: Final answer
    x = 106,685.90

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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.