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Finding the Fourth Proportional to 86,608.47, 129,916.32 and 27,442.83

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Solution

The fourth proportional to 86,608.47, 129,916.32 and 27,442.83 is: 41,165.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,608.47 : 129,916.32 = 27,442.83 : x
  2. Step 2: Convert to fraction form
    86,608.47/129,916.32 = 27,442.83/x
  3. Step 3: Cross multiply
    86,608.47x = 129,916.32 × 27,442.83
  4. Step 4: Simplify right side
    86,608.47x = 3,565,271,483.99
  5. Step 5: Solve for x
    x = 3,565,271,483.99/86,608.47
  6. Step 6: Final answer
    x = 41,165.39

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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.