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Finding the Fourth Proportional to 70,559.34, 97,370.50 and 39,931.87

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Solution

The fourth proportional to 70,559.34, 97,370.50 and 39,931.87 is: 55,105.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,559.34 : 97,370.50 = 39,931.87 : x
  2. Step 2: Convert to fraction form
    70,559.34/97,370.50 = 39,931.87/x
  3. Step 3: Cross multiply
    70,559.34x = 97,370.50 × 39,931.87
  4. Step 4: Simplify right side
    70,559.34x = 3,888,185,854.49
  5. Step 5: Solve for x
    x = 3,888,185,854.49/70,559.34
  6. Step 6: Final answer
    x = 55,105.19

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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.