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Finding the Fourth Proportional to 86,837.30, 130,061.55 and 67,051.70

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Solution

The fourth proportional to 86,837.30, 130,061.55 and 67,051.70 is: 100,427.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,837.30 : 130,061.55 = 67,051.70 : x
  2. Step 2: Convert to fraction form
    86,837.30/130,061.55 = 67,051.70/x
  3. Step 3: Cross multiply
    86,837.30x = 130,061.55 × 67,051.70
  4. Step 4: Simplify right side
    86,837.30x = 8,720,848,032.14
  5. Step 5: Solve for x
    x = 8,720,848,032.14/86,837.30
  6. Step 6: Final answer
    x = 100,427.44

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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.