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Finding the Fourth Proportional to 88,478.40, 132,415.20 and 53,443.20

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Solution

The fourth proportional to 88,478.40, 132,415.20 and 53,443.20 is: 79,982.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,478.40 : 132,415.20 = 53,443.20 : x
  2. Step 2: Convert to fraction form
    88,478.40/132,415.20 = 53,443.20/x
  3. Step 3: Cross multiply
    88,478.40x = 132,415.20 × 53,443.20
  4. Step 4: Simplify right side
    88,478.40x = 7,076,692,016.64
  5. Step 5: Solve for x
    x = 7,076,692,016.64/88,478.40
  6. Step 6: Final answer
    x = 79,982.14

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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.