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Finding the Fourth Proportional to 138,068.60, 190,488.83 and 112,531.10

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Solution

The fourth proportional to 138,068.60, 190,488.83 and 112,531.10 is: 155,255.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,068.60 : 190,488.83 = 112,531.10 : x
  2. Step 2: Convert to fraction form
    138,068.60/190,488.83 = 112,531.10/x
  3. Step 3: Cross multiply
    138,068.60x = 190,488.83 × 112,531.10
  4. Step 4: Simplify right side
    138,068.60x = 21,435,916,062.51
  5. Step 5: Solve for x
    x = 21,435,916,062.51/138,068.60
  6. Step 6: Final answer
    x = 155,255.55

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.