Home / 121,588.02-167,788.65-67,878

Finding the Fourth Proportional to 121,588.02, 167,788.65 and 67,878

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Solution

The fourth proportional to 121,588.02, 167,788.65 and 67,878 is: 93,670.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,588.02 : 167,788.65 = 67,878 : x
  2. Step 2: Convert to fraction form
    121,588.02/167,788.65 = 67,878/x
  3. Step 3: Cross multiply
    121,588.02x = 167,788.65 × 67,878
  4. Step 4: Simplify right side
    121,588.02x = 11,389,157,984.70
  5. Step 5: Solve for x
    x = 11,389,157,984.70/121,588.02
  6. Step 6: Final answer
    x = 93,670.07

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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.