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Finding the Fourth Proportional to 69,323.90, 95,678.75 and 39,117.78

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Solution

The fourth proportional to 69,323.90, 95,678.75 and 39,117.78 is: 53,989.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,323.90 : 95,678.75 = 39,117.78 : x
  2. Step 2: Convert to fraction form
    69,323.90/95,678.75 = 39,117.78/x
  3. Step 3: Cross multiply
    69,323.90x = 95,678.75 × 39,117.78
  4. Step 4: Simplify right side
    69,323.90x = 3,742,740,293.18
  5. Step 5: Solve for x
    x = 3,742,740,293.18/69,323.90
  6. Step 6: Final answer
    x = 53,989.18

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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.