Home / 131,828.07-181,931.10-78,101.69

Finding the Fourth Proportional to 131,828.07, 181,931.10 and 78,101.69

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Solution

The fourth proportional to 131,828.07, 181,931.10 and 78,101.69 is: 107,785.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,828.07 : 181,931.10 = 78,101.69 : x
  2. Step 2: Convert to fraction form
    131,828.07/181,931.10 = 78,101.69/x
  3. Step 3: Cross multiply
    131,828.07x = 181,931.10 × 78,101.69
  4. Step 4: Simplify right side
    131,828.07x = 14,209,125,463.90
  5. Step 5: Solve for x
    x = 14,209,125,463.90/131,828.07
  6. Step 6: Final answer
    x = 107,785.28

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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.