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Finding the Fourth Proportional to 212,432.48, 318,648.74 and 79,323.16

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Solution

The fourth proportional to 212,432.48, 318,648.74 and 79,323.16 is: 118,984.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,432.48 : 318,648.74 = 79,323.16 : x
  2. Step 2: Convert to fraction form
    212,432.48/318,648.74 = 79,323.16/x
  3. Step 3: Cross multiply
    212,432.48x = 318,648.74 × 79,323.16
  4. Step 4: Simplify right side
    212,432.48x = 25,276,224,986.82
  5. Step 5: Solve for x
    x = 25,276,224,986.82/212,432.48
  6. Step 6: Final answer
    x = 118,984.75

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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.