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Finding the Fourth Proportional to 70,390.91, 97,139.42 and 38,559.80

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Solution

The fourth proportional to 70,390.91, 97,139.42 and 38,559.80 is: 53,212.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,390.91 : 97,139.42 = 38,559.80 : x
  2. Step 2: Convert to fraction form
    70,390.91/97,139.42 = 38,559.80/x
  3. Step 3: Cross multiply
    70,390.91x = 97,139.42 × 38,559.80
  4. Step 4: Simplify right side
    70,390.91x = 3,745,676,607.32
  5. Step 5: Solve for x
    x = 3,745,676,607.32/70,390.91
  6. Step 6: Final answer
    x = 53,212.50

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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.