Home / 138,141.29-190,646.06-77,708.34

Finding the Fourth Proportional to 138,141.29, 190,646.06 and 77,708.34

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Solution

The fourth proportional to 138,141.29, 190,646.06 and 77,708.34 is: 107,243.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,141.29 : 190,646.06 = 77,708.34 : x
  2. Step 2: Convert to fraction form
    138,141.29/190,646.06 = 77,708.34/x
  3. Step 3: Cross multiply
    138,141.29x = 190,646.06 × 77,708.34
  4. Step 4: Simplify right side
    138,141.29x = 14,814,788,461.60
  5. Step 5: Solve for x
    x = 14,814,788,461.60/138,141.29
  6. Step 6: Final answer
    x = 107,243.74

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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.