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Finding the Fourth Proportional to 53,750.40, 80,649.60 and 18,715.20

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Solution

The fourth proportional to 53,750.40, 80,649.60 and 18,715.20 is: 28,081.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,750.40 : 80,649.60 = 18,715.20 : x
  2. Step 2: Convert to fraction form
    53,750.40/80,649.60 = 18,715.20/x
  3. Step 3: Cross multiply
    53,750.40x = 80,649.60 × 18,715.20
  4. Step 4: Simplify right side
    53,750.40x = 1,509,373,393.92
  5. Step 5: Solve for x
    x = 1,509,373,393.92/53,750.40
  6. Step 6: Final answer
    x = 28,081.16

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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.