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Finding the Fourth Proportional to 128,547.70, 192,821.55 and 75,930.10

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Solution

The fourth proportional to 128,547.70, 192,821.55 and 75,930.10 is: 113,895.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,547.70 : 192,821.55 = 75,930.10 : x
  2. Step 2: Convert to fraction form
    128,547.70/192,821.55 = 75,930.10/x
  3. Step 3: Cross multiply
    128,547.70x = 192,821.55 × 75,930.10
  4. Step 4: Simplify right side
    128,547.70x = 14,640,959,573.66
  5. Step 5: Solve for x
    x = 14,640,959,573.66/128,547.70
  6. Step 6: Final answer
    x = 113,895.15

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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.