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Finding the Fourth Proportional to 92,911.96, 128,203.31 and 54,703.70

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Solution

The fourth proportional to 92,911.96, 128,203.31 and 54,703.70 is: 75,482.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,911.96 : 128,203.31 = 54,703.70 : x
  2. Step 2: Convert to fraction form
    92,911.96/128,203.31 = 54,703.70/x
  3. Step 3: Cross multiply
    92,911.96x = 128,203.31 × 54,703.70
  4. Step 4: Simplify right side
    92,911.96x = 7,013,195,799.19
  5. Step 5: Solve for x
    x = 7,013,195,799.19/92,911.96
  6. Step 6: Final answer
    x = 75,482.16

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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.