Home / 138,320.97-190,881.09-77,897.58

Finding the Fourth Proportional to 138,320.97, 190,881.09 and 77,897.58

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Solution

The fourth proportional to 138,320.97, 190,881.09 and 77,897.58 is: 107,497.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,320.97 : 190,881.09 = 77,897.58 : x
  2. Step 2: Convert to fraction form
    138,320.97/190,881.09 = 77,897.58/x
  3. Step 3: Cross multiply
    138,320.97x = 190,881.09 × 77,897.58
  4. Step 4: Simplify right side
    138,320.97x = 14,869,174,978.76
  5. Step 5: Solve for x
    x = 14,869,174,978.76/138,320.97
  6. Step 6: Final answer
    x = 107,497.62

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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.