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Finding the Fourth Proportional to 78,191.84, 117,293.04 and 38,738.36

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Solution

The fourth proportional to 78,191.84, 117,293.04 and 38,738.36 is: 58,110.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,191.84 : 117,293.04 = 38,738.36 : x
  2. Step 2: Convert to fraction form
    78,191.84/117,293.04 = 38,738.36/x
  3. Step 3: Cross multiply
    78,191.84x = 117,293.04 × 38,738.36
  4. Step 4: Simplify right side
    78,191.84x = 4,543,740,009.01
  5. Step 5: Solve for x
    x = 4,543,740,009.01/78,191.84
  6. Step 6: Final answer
    x = 58,110.16

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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.