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Finding the Fourth Proportional to 70,390.65, 97,139.08 and 38,559.54

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Solution

The fourth proportional to 70,390.65, 97,139.08 and 38,559.54 is: 53,212.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,390.65 : 97,139.08 = 38,559.54 : x
  2. Step 2: Convert to fraction form
    70,390.65/97,139.08 = 38,559.54/x
  3. Step 3: Cross multiply
    70,390.65x = 97,139.08 × 38,559.54
  4. Step 4: Simplify right side
    70,390.65x = 3,745,638,240.82
  5. Step 5: Solve for x
    x = 3,745,638,240.82/70,390.65
  6. Step 6: Final answer
    x = 53,212.16

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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.