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Finding the Fourth Proportional to 70,790.48, 97,690.20 and 38,958.56

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Solution

The fourth proportional to 70,790.48, 97,690.20 and 38,958.56 is: 53,762.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,790.48 : 97,690.20 = 38,958.56 : x
  2. Step 2: Convert to fraction form
    70,790.48/97,690.20 = 38,958.56/x
  3. Step 3: Cross multiply
    70,790.48x = 97,690.20 × 38,958.56
  4. Step 4: Simplify right side
    70,790.48x = 3,805,869,518.11
  5. Step 5: Solve for x
    x = 3,805,869,518.11/70,790.48
  6. Step 6: Final answer
    x = 53,762.45

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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.