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Finding the Fourth Proportional to 86,678.40, 130,030.20 and 36,758.40

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Solution

The fourth proportional to 86,678.40, 130,030.20 and 36,758.40 is: 55,142.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,678.40 : 130,030.20 = 36,758.40 : x
  2. Step 2: Convert to fraction form
    86,678.40/130,030.20 = 36,758.40/x
  3. Step 3: Cross multiply
    86,678.40x = 130,030.20 × 36,758.40
  4. Step 4: Simplify right side
    86,678.40x = 4,779,702,103.68
  5. Step 5: Solve for x
    x = 4,779,702,103.68/86,678.40
  6. Step 6: Final answer
    x = 55,142.94

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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.