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Finding the Fourth Proportional to 65,509.21, 90,403.01 and 37,216.45

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Solution

The fourth proportional to 65,509.21, 90,403.01 and 37,216.45 is: 51,358.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,509.21 : 90,403.01 = 37,216.45 : x
  2. Step 2: Convert to fraction form
    65,509.21/90,403.01 = 37,216.45/x
  3. Step 3: Cross multiply
    65,509.21x = 90,403.01 × 37,216.45
  4. Step 4: Simplify right side
    65,509.21x = 3,364,478,828.99
  5. Step 5: Solve for x
    x = 3,364,478,828.99/65,509.21
  6. Step 6: Final answer
    x = 51,358.87

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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.