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Finding the Fourth Proportional to 89,893.20, 134,985.60 and 65,107.20

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Solution

The fourth proportional to 89,893.20, 134,985.60 and 65,107.20 is: 97,766.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,893.20 : 134,985.60 = 65,107.20 : x
  2. Step 2: Convert to fraction form
    89,893.20/134,985.60 = 65,107.20/x
  3. Step 3: Cross multiply
    89,893.20x = 134,985.60 × 65,107.20
  4. Step 4: Simplify right side
    89,893.20x = 8,788,534,456.32
  5. Step 5: Solve for x
    x = 8,788,534,456.32/89,893.20
  6. Step 6: Final answer
    x = 97,766.40

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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.