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Finding the Fourth Proportional to 70,898.40, 97,840.08 and 39,065.76

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Solution

The fourth proportional to 70,898.40, 97,840.08 and 39,065.76 is: 53,910.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,898.40 : 97,840.08 = 39,065.76 : x
  2. Step 2: Convert to fraction form
    70,898.40/97,840.08 = 39,065.76/x
  3. Step 3: Cross multiply
    70,898.40x = 97,840.08 × 39,065.76
  4. Step 4: Simplify right side
    70,898.40x = 3,822,197,083.66
  5. Step 5: Solve for x
    x = 3,822,197,083.66/70,898.40
  6. Step 6: Final answer
    x = 53,910.91

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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.