Home / 121,870.02-168,189.21-68,160.05

Finding the Fourth Proportional to 121,870.02, 168,189.21 and 68,160.05

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Solution

The fourth proportional to 121,870.02, 168,189.21 and 68,160.05 is: 94,065.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,870.02 : 168,189.21 = 68,160.05 : x
  2. Step 2: Convert to fraction form
    121,870.02/168,189.21 = 68,160.05/x
  3. Step 3: Cross multiply
    121,870.02x = 168,189.21 × 68,160.05
  4. Step 4: Simplify right side
    121,870.02x = 11,463,784,122.11
  5. Step 5: Solve for x
    x = 11,463,784,122.11/121,870.02
  6. Step 6: Final answer
    x = 94,065.66

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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.