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Finding the Fourth Proportional to 70,388,032.80, 105,582,049.20 and 65,286,199.20

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Solution

The fourth proportional to 70,388,032.80, 105,582,049.20 and 65,286,199.20 is: 97,929,298.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,388,032.80 : 105,582,049.20 = 65,286,199.20 : x
  2. Step 2: Convert to fraction form
    70,388,032.80/105,582,049.20 = 65,286,199.20/x
  3. Step 3: Cross multiply
    70,388,032.80x = 105,582,049.20 × 65,286,199.20
  4. Step 4: Simplify right side
    70,388,032.80x = 6,893,050,696,015,401
  5. Step 5: Solve for x
    x = 6,893,050,696,015,401/70,388,032.80
  6. Step 6: Final answer
    x = 97,929,298.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.