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Finding the Fourth Proportional to 70,953.90, 97,920.78 and 39,122.74

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Solution

The fourth proportional to 70,953.90, 97,920.78 and 39,122.74 is: 53,991.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,953.90 : 97,920.78 = 39,122.74 : x
  2. Step 2: Convert to fraction form
    70,953.90/97,920.78 = 39,122.74/x
  3. Step 3: Cross multiply
    70,953.90x = 97,920.78 × 39,122.74
  4. Step 4: Simplify right side
    70,953.90x = 3,830,929,216.54
  5. Step 5: Solve for x
    x = 3,830,929,216.54/70,953.90
  6. Step 6: Final answer
    x = 53,991.81

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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.