Home / 53,742.40-80,440.80-28,719.76

Finding the Fourth Proportional to 53,742.40, 80,440.80 and 28,719.76

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Solution

The fourth proportional to 53,742.40, 80,440.80 and 28,719.76 is: 42,987.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,742.40 : 80,440.80 = 28,719.76 : x
  2. Step 2: Convert to fraction form
    53,742.40/80,440.80 = 28,719.76/x
  3. Step 3: Cross multiply
    53,742.40x = 80,440.80 × 28,719.76
  4. Step 4: Simplify right side
    53,742.40x = 2,310,240,470.21
  5. Step 5: Solve for x
    x = 2,310,240,470.21/53,742.40
  6. Step 6: Final answer
    x = 42,987.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.