Home / 121,567.25-167,851.71-78,572.21

Finding the Fourth Proportional to 121,567.25, 167,851.71 and 78,572.21

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Solution

The fourth proportional to 121,567.25, 167,851.71 and 78,572.21 is: 108,487.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,567.25 : 167,851.71 = 78,572.21 : x
  2. Step 2: Convert to fraction form
    121,567.25/167,851.71 = 78,572.21/x
  3. Step 3: Cross multiply
    121,567.25x = 167,851.71 × 78,572.21
  4. Step 4: Simplify right side
    121,567.25x = 13,188,478,967.72
  5. Step 5: Solve for x
    x = 13,188,478,967.72/121,567.25
  6. Step 6: Final answer
    x = 108,487.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.