Home / 70,939.16-97,896.80-39,109.20

Finding the Fourth Proportional to 70,939.16, 97,896.80 and 39,109.20

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Solution

The fourth proportional to 70,939.16, 97,896.80 and 39,109.20 is: 53,971.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,939.16 : 97,896.80 = 39,109.20 : x
  2. Step 2: Convert to fraction form
    70,939.16/97,896.80 = 39,109.20/x
  3. Step 3: Cross multiply
    70,939.16x = 97,896.80 × 39,109.20
  4. Step 4: Simplify right side
    70,939.16x = 3,828,665,335.01
  5. Step 5: Solve for x
    x = 3,828,665,335.01/70,939.16
  6. Step 6: Final answer
    x = 53,971.12

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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.