Home / 131,715.90-181,756.44-77,991.30

Finding the Fourth Proportional to 131,715.90, 181,756.44 and 77,991.30

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Solution

The fourth proportional to 131,715.90, 181,756.44 and 77,991.30 is: 107,621.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,715.90 : 181,756.44 = 77,991.30 : x
  2. Step 2: Convert to fraction form
    131,715.90/181,756.44 = 77,991.30/x
  3. Step 3: Cross multiply
    131,715.90x = 181,756.44 × 77,991.30
  4. Step 4: Simplify right side
    131,715.90x = 14,175,421,038.97
  5. Step 5: Solve for x
    x = 14,175,421,038.97/131,715.90
  6. Step 6: Final answer
    x = 107,621.18

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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.