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Finding the Fourth Proportional to 70,425, 105,678.27 and 26,082.90

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Solution

The fourth proportional to 70,425, 105,678.27 and 26,082.90 is: 39,139.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,425 : 105,678.27 = 26,082.90 : x
  2. Step 2: Convert to fraction form
    70,425/105,678.27 = 26,082.90/x
  3. Step 3: Cross multiply
    70,425x = 105,678.27 × 26,082.90
  4. Step 4: Simplify right side
    70,425x = 2,756,395,748.58
  5. Step 5: Solve for x
    x = 2,756,395,748.58/70,425
  6. Step 6: Final answer
    x = 39,139.45

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1.5x scale

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.