Home / 112,979.70-155,905.74-65,230.20

Finding the Fourth Proportional to 112,979.70, 155,905.74 and 65,230.20

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Solution

The fourth proportional to 112,979.70, 155,905.74 and 65,230.20 is: 90,014.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,979.70 : 155,905.74 = 65,230.20 : x
  2. Step 2: Convert to fraction form
    112,979.70/155,905.74 = 65,230.20/x
  3. Step 3: Cross multiply
    112,979.70x = 155,905.74 × 65,230.20
  4. Step 4: Simplify right side
    112,979.70x = 10,169,762,601.35
  5. Step 5: Solve for x
    x = 10,169,762,601.35/112,979.70
  6. Step 6: Final answer
    x = 90,014.07

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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.