Home / 65,478.12-90,355.56-38,614.48

Finding the Fourth Proportional to 65,478.12, 90,355.56 and 38,614.48

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Solution

The fourth proportional to 65,478.12, 90,355.56 and 38,614.48 is: 53,285.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,478.12 : 90,355.56 = 38,614.48 : x
  2. Step 2: Convert to fraction form
    65,478.12/90,355.56 = 38,614.48/x
  3. Step 3: Cross multiply
    65,478.12x = 90,355.56 × 38,614.48
  4. Step 4: Simplify right side
    65,478.12x = 3,489,032,964.51
  5. Step 5: Solve for x
    x = 3,489,032,964.51/65,478.12
  6. Step 6: Final answer
    x = 53,285.48

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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.