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Finding the Fourth Proportional to 71,705.12, 107,015.32 and 69,838.88

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Solution

The fourth proportional to 71,705.12, 107,015.32 and 69,838.88 is: 104,230.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,705.12 : 107,015.32 = 69,838.88 : x
  2. Step 2: Convert to fraction form
    71,705.12/107,015.32 = 69,838.88/x
  3. Step 3: Cross multiply
    71,705.12x = 107,015.32 × 69,838.88
  4. Step 4: Simplify right side
    71,705.12x = 7,473,830,091.64
  5. Step 5: Solve for x
    x = 7,473,830,091.64/71,705.12
  6. Step 6: Final answer
    x = 104,230.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.