Home / 212,430.48-318,645.74-79,321.16

Finding the Fourth Proportional to 212,430.48, 318,645.74 and 79,321.16

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Solution

The fourth proportional to 212,430.48, 318,645.74 and 79,321.16 is: 118,981.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,430.48 : 318,645.74 = 79,321.16 : x
  2. Step 2: Convert to fraction form
    212,430.48/318,645.74 = 79,321.16/x
  3. Step 3: Cross multiply
    212,430.48x = 318,645.74 × 79,321.16
  4. Step 4: Simplify right side
    212,430.48x = 25,275,349,725.86
  5. Step 5: Solve for x
    x = 25,275,349,725.86/212,430.48
  6. Step 6: Final answer
    x = 118,981.75

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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.