Home / 112,398.65-155,143.40-64,685.60

Finding the Fourth Proportional to 112,398.65, 155,143.40 and 64,685.60

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Solution

The fourth proportional to 112,398.65, 155,143.40 and 64,685.60 is: 89,285.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,398.65 : 155,143.40 = 64,685.60 : x
  2. Step 2: Convert to fraction form
    112,398.65/155,143.40 = 64,685.60/x
  3. Step 3: Cross multiply
    112,398.65x = 155,143.40 × 64,685.60
  4. Step 4: Simplify right side
    112,398.65x = 10,035,542,815.90
  5. Step 5: Solve for x
    x = 10,035,542,815.90/112,398.65
  6. Step 6: Final answer
    x = 89,285.27

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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.