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Finding the Fourth Proportional to 70,909.30, 97,850.18 and 39,078.18

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Solution

The fourth proportional to 70,909.30, 97,850.18 and 39,078.18 is: 53,925.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,909.30 : 97,850.18 = 39,078.18 : x
  2. Step 2: Convert to fraction form
    70,909.30/97,850.18 = 39,078.18/x
  3. Step 3: Cross multiply
    70,909.30x = 97,850.18 × 39,078.18
  4. Step 4: Simplify right side
    70,909.30x = 3,823,806,947.07
  5. Step 5: Solve for x
    x = 3,823,806,947.07/70,909.30
  6. Step 6: Final answer
    x = 53,925.32

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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.