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Finding the Fourth Proportional to 70,987.32, 97,958.97 and 39,155.40

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Solution

The fourth proportional to 70,987.32, 97,958.97 and 39,155.40 is: 54,032.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,987.32 : 97,958.97 = 39,155.40 : x
  2. Step 2: Convert to fraction form
    70,987.32/97,958.97 = 39,155.40/x
  3. Step 3: Cross multiply
    70,987.32x = 97,958.97 × 39,155.40
  4. Step 4: Simplify right side
    70,987.32x = 3,835,622,653.94
  5. Step 5: Solve for x
    x = 3,835,622,653.94/70,987.32
  6. Step 6: Final answer
    x = 54,032.50

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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.