Home / 138,339.78-190,915.29-77,929.62

Finding the Fourth Proportional to 138,339.78, 190,915.29 and 77,929.62

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Solution

The fourth proportional to 138,339.78, 190,915.29 and 77,929.62 is: 107,546.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,339.78 : 190,915.29 = 77,929.62 : x
  2. Step 2: Convert to fraction form
    138,339.78/190,915.29 = 77,929.62/x
  3. Step 3: Cross multiply
    138,339.78x = 190,915.29 × 77,929.62
  4. Step 4: Simplify right side
    138,339.78x = 14,877,956,001.89
  5. Step 5: Solve for x
    x = 14,877,956,001.89/138,339.78
  6. Step 6: Final answer
    x = 107,546.48

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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.