Home / 129,807.12-179,136.16-76,130.86

Finding the Fourth Proportional to 129,807.12, 179,136.16 and 76,130.86

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Solution

The fourth proportional to 129,807.12, 179,136.16 and 76,130.86 is: 105,061.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,807.12 : 179,136.16 = 76,130.86 : x
  2. Step 2: Convert to fraction form
    129,807.12/179,136.16 = 76,130.86/x
  3. Step 3: Cross multiply
    129,807.12x = 179,136.16 × 76,130.86
  4. Step 4: Simplify right side
    129,807.12x = 13,637,789,917.90
  5. Step 5: Solve for x
    x = 13,637,789,917.90/129,807.12
  6. Step 6: Final answer
    x = 105,061.96

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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.