Home / 121,077.18-167,038.20-78,051.60

Finding the Fourth Proportional to 121,077.18, 167,038.20 and 78,051.60

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Solution

The fourth proportional to 121,077.18, 167,038.20 and 78,051.60 is: 107,680.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,077.18 : 167,038.20 = 78,051.60 : x
  2. Step 2: Convert to fraction form
    121,077.18/167,038.20 = 78,051.60/x
  3. Step 3: Cross multiply
    121,077.18x = 167,038.20 × 78,051.60
  4. Step 4: Simplify right side
    121,077.18x = 13,037,598,771.12
  5. Step 5: Solve for x
    x = 13,037,598,771.12/121,077.18
  6. Step 6: Final answer
    x = 107,680.07

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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.