Home / 138,117.22-190,603.73-81,528.59

Finding the Fourth Proportional to 138,117.22, 190,603.73 and 81,528.59

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Solution

The fourth proportional to 138,117.22, 190,603.73 and 81,528.59 is: 112,510.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,117.22 : 190,603.73 = 81,528.59 : x
  2. Step 2: Convert to fraction form
    138,117.22/190,603.73 = 81,528.59/x
  3. Step 3: Cross multiply
    138,117.22x = 190,603.73 × 81,528.59
  4. Step 4: Simplify right side
    138,117.22x = 15,539,652,948.00
  5. Step 5: Solve for x
    x = 15,539,652,948.00/138,117.22
  6. Step 6: Final answer
    x = 112,510.62

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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.