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Finding the Fourth Proportional to 92,920.30, 128,215.65 and 54,699.10

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Solution

The fourth proportional to 92,920.30, 128,215.65 and 54,699.10 is: 75,476.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,920.30 : 128,215.65 = 54,699.10 : x
  2. Step 2: Convert to fraction form
    92,920.30/128,215.65 = 54,699.10/x
  3. Step 3: Cross multiply
    92,920.30x = 128,215.65 × 54,699.10
  4. Step 4: Simplify right side
    92,920.30x = 7,013,280,660.92
  5. Step 5: Solve for x
    x = 7,013,280,660.92/92,920.30
  6. Step 6: Final answer
    x = 75,476.30

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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.