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Finding the Fourth Proportional to 348,726, 523,089 and 86,070

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Solution

The fourth proportional to 348,726, 523,089 and 86,070 is: 129,105

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,726 : 523,089 = 86,070 : x
  2. Step 2: Convert to fraction form
    348,726/523,089 = 86,070/x
  3. Step 3: Cross multiply
    348,726x = 523,089 × 86,070
  4. Step 4: Simplify right side
    348,726x = 45,022,270,230
  5. Step 5: Solve for x
    x = 45,022,270,230/348,726
  6. Step 6: Final answer
    x = 129,105

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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.