Home / 112,390.20-155,280.78-111,284.28

Finding the Fourth Proportional to 112,390.20, 155,280.78 and 111,284.28

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Solution

The fourth proportional to 112,390.20, 155,280.78 and 111,284.28 is: 153,752.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,390.20 : 155,280.78 = 111,284.28 : x
  2. Step 2: Convert to fraction form
    112,390.20/155,280.78 = 111,284.28/x
  3. Step 3: Cross multiply
    112,390.20x = 155,280.78 × 111,284.28
  4. Step 4: Simplify right side
    112,390.20x = 17,280,309,800.14
  5. Step 5: Solve for x
    x = 17,280,309,800.14/112,390.20
  6. Step 6: Final answer
    x = 153,752.82

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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.