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Finding the Fourth Proportional to 70,910, 97,854.60 and 39,078.22

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Solution

The fourth proportional to 70,910, 97,854.60 and 39,078.22 is: 53,927.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,910 : 97,854.60 = 39,078.22 : x
  2. Step 2: Convert to fraction form
    70,910/97,854.60 = 39,078.22/x
  3. Step 3: Cross multiply
    70,910x = 97,854.60 × 39,078.22
  4. Step 4: Simplify right side
    70,910x = 3,823,983,586.81
  5. Step 5: Solve for x
    x = 3,823,983,586.81/70,910
  6. Step 6: Final answer
    x = 53,927.28

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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.