Home / 131,398.90-196,849.12-77,977.98

Finding the Fourth Proportional to 131,398.90, 196,849.12 and 77,977.98

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Solution

The fourth proportional to 131,398.90, 196,849.12 and 77,977.98 is: 116,819.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,398.90 : 196,849.12 = 77,977.98 : x
  2. Step 2: Convert to fraction form
    131,398.90/196,849.12 = 77,977.98/x
  3. Step 3: Cross multiply
    131,398.90x = 196,849.12 × 77,977.98
  4. Step 4: Simplify right side
    131,398.90x = 15,349,896,742.38
  5. Step 5: Solve for x
    x = 15,349,896,742.38/131,398.90
  6. Step 6: Final answer
    x = 116,819.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.