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Finding the Fourth Proportional to 120,915.15, 166,849.59 and 69,920.13

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Solution

The fourth proportional to 120,915.15, 166,849.59 and 69,920.13 is: 96,482.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,915.15 : 166,849.59 = 69,920.13 : x
  2. Step 2: Convert to fraction form
    120,915.15/166,849.59 = 69,920.13/x
  3. Step 3: Cross multiply
    120,915.15x = 166,849.59 × 69,920.13
  4. Step 4: Simplify right side
    120,915.15x = 11,666,145,023.25
  5. Step 5: Solve for x
    x = 11,666,145,023.25/120,915.15
  6. Step 6: Final answer
    x = 96,482.08

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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.