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Finding the Fourth Proportional to 65,479.72, 90,362.10 and 37,185.40

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Solution

The fourth proportional to 65,479.72, 90,362.10 and 37,185.40 is: 51,315.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,479.72 : 90,362.10 = 37,185.40 : x
  2. Step 2: Convert to fraction form
    65,479.72/90,362.10 = 37,185.40/x
  3. Step 3: Cross multiply
    65,479.72x = 90,362.10 × 37,185.40
  4. Step 4: Simplify right side
    65,479.72x = 3,360,150,833.34
  5. Step 5: Solve for x
    x = 3,360,150,833.34/65,479.72
  6. Step 6: Final answer
    x = 51,315.90

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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.