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Finding the Fourth Proportional to 70,920.68, 97,870.99 and 39,089.58

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Solution

The fourth proportional to 70,920.68, 97,870.99 and 39,089.58 is: 53,943.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,920.68 : 97,870.99 = 39,089.58 : x
  2. Step 2: Convert to fraction form
    70,920.68/97,870.99 = 39,089.58/x
  3. Step 3: Cross multiply
    70,920.68x = 97,870.99 × 39,089.58
  4. Step 4: Simplify right side
    70,920.68x = 3,825,735,893.28
  5. Step 5: Solve for x
    x = 3,825,735,893.28/70,920.68
  6. Step 6: Final answer
    x = 53,943.87

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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.