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Finding the Fourth Proportional to 112,393.80, 155,138.32 and 69,386.84

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Solution

The fourth proportional to 112,393.80, 155,138.32 and 69,386.84 is: 95,775.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,393.80 : 155,138.32 = 69,386.84 : x
  2. Step 2: Convert to fraction form
    112,393.80/155,138.32 = 69,386.84/x
  3. Step 3: Cross multiply
    112,393.80x = 155,138.32 × 69,386.84
  4. Step 4: Simplify right side
    112,393.80x = 10,764,557,787.71
  5. Step 5: Solve for x
    x = 10,764,557,787.71/112,393.80
  6. Step 6: Final answer
    x = 95,775.37

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1.5x scale

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.