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Finding the Fourth Proportional to 92,885.90, 128,193.48 and 55,160.15

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Solution

The fourth proportional to 92,885.90, 128,193.48 and 55,160.15 is: 76,127.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,885.90 : 128,193.48 = 55,160.15 : x
  2. Step 2: Convert to fraction form
    92,885.90/128,193.48 = 55,160.15/x
  3. Step 3: Cross multiply
    92,885.90x = 128,193.48 × 55,160.15
  4. Step 4: Simplify right side
    92,885.90x = 7,071,170,944.85
  5. Step 5: Solve for x
    x = 7,071,170,944.85/92,885.90
  6. Step 6: Final answer
    x = 76,127.50

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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.