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Finding the Fourth Proportional to 70,870, 97,800.60 and 39,038.80

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Solution

The fourth proportional to 70,870, 97,800.60 and 39,038.80 is: 53,873.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,870 : 97,800.60 = 39,038.80 : x
  2. Step 2: Convert to fraction form
    70,870/97,800.60 = 39,038.80/x
  3. Step 3: Cross multiply
    70,870x = 97,800.60 × 39,038.80
  4. Step 4: Simplify right side
    70,870x = 3,818,018,063.28
  5. Step 5: Solve for x
    x = 3,818,018,063.28/70,870
  6. Step 6: Final answer
    x = 53,873.54

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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.