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Finding the Fourth Proportional to 92,921.30, 128,217.03 and 54,700.10

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Solution

The fourth proportional to 92,921.30, 128,217.03 and 54,700.10 is: 75,477.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,921.30 : 128,217.03 = 54,700.10 : x
  2. Step 2: Convert to fraction form
    92,921.30/128,217.03 = 54,700.10/x
  3. Step 3: Cross multiply
    92,921.30x = 128,217.03 × 54,700.10
  4. Step 4: Simplify right side
    92,921.30x = 7,013,484,362.70
  5. Step 5: Solve for x
    x = 7,013,484,362.70/92,921.30
  6. Step 6: Final answer
    x = 75,477.68

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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.