Home / 70,939.40-97,900.78-39,108.24

Finding the Fourth Proportional to 70,939.40, 97,900.78 and 39,108.24

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Solution

The fourth proportional to 70,939.40, 97,900.78 and 39,108.24 is: 53,971.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,939.40 : 97,900.78 = 39,108.24 : x
  2. Step 2: Convert to fraction form
    70,939.40/97,900.78 = 39,108.24/x
  3. Step 3: Cross multiply
    70,939.40x = 97,900.78 × 39,108.24
  4. Step 4: Simplify right side
    70,939.40x = 3,828,727,200.43
  5. Step 5: Solve for x
    x = 3,828,727,200.43/70,939.40
  6. Step 6: Final answer
    x = 53,971.80

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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.