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Finding the Fourth Proportional to 65,313.36, 90,152.64 and 38,453.76

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Solution

The fourth proportional to 65,313.36, 90,152.64 and 38,453.76 is: 53,078.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,313.36 : 90,152.64 = 38,453.76 : x
  2. Step 2: Convert to fraction form
    65,313.36/90,152.64 = 38,453.76/x
  3. Step 3: Cross multiply
    65,313.36x = 90,152.64 × 38,453.76
  4. Step 4: Simplify right side
    65,313.36x = 3,466,707,981.93
  5. Step 5: Solve for x
    x = 3,466,707,981.93/65,313.36
  6. Step 6: Final answer
    x = 53,078.08

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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.