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Finding the Fourth Proportional to 70,138.90, 96,767.67 and 39,916.65

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Solution

The fourth proportional to 70,138.90, 96,767.67 and 39,916.65 is: 55,071.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,138.90 : 96,767.67 = 39,916.65 : x
  2. Step 2: Convert to fraction form
    70,138.90/96,767.67 = 39,916.65/x
  3. Step 3: Cross multiply
    70,138.90x = 96,767.67 × 39,916.65
  4. Step 4: Simplify right side
    70,138.90x = 3,862,641,214.71
  5. Step 5: Solve for x
    x = 3,862,641,214.71/70,138.90
  6. Step 6: Final answer
    x = 55,071.31

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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.