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Finding the Fourth Proportional to 121,390.58, 167,520.48 and 70,415.12

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Solution

The fourth proportional to 121,390.58, 167,520.48 and 70,415.12 is: 97,173.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,390.58 : 167,520.48 = 70,415.12 : x
  2. Step 2: Convert to fraction form
    121,390.58/167,520.48 = 70,415.12/x
  3. Step 3: Cross multiply
    121,390.58x = 167,520.48 × 70,415.12
  4. Step 4: Simplify right side
    121,390.58x = 11,795,974,701.66
  5. Step 5: Solve for x
    x = 11,795,974,701.66/121,390.58
  6. Step 6: Final answer
    x = 97,173.72

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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.