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Finding the Fourth Proportional to 86,912.30, 130,368.45 and 63,584.30

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Solution

The fourth proportional to 86,912.30, 130,368.45 and 63,584.30 is: 95,376.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,912.30 : 130,368.45 = 63,584.30 : x
  2. Step 2: Convert to fraction form
    86,912.30/130,368.45 = 63,584.30/x
  3. Step 3: Cross multiply
    86,912.30x = 130,368.45 × 63,584.30
  4. Step 4: Simplify right side
    86,912.30x = 8,289,386,635.34
  5. Step 5: Solve for x
    x = 8,289,386,635.34/86,912.30
  6. Step 6: Final answer
    x = 95,376.45

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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.