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Finding the Fourth Proportional to 65,475.63, 90,409.68 and 53,378.01

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Solution

The fourth proportional to 65,475.63, 90,409.68 and 53,378.01 is: 73,705.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,475.63 : 90,409.68 = 53,378.01 : x
  2. Step 2: Convert to fraction form
    65,475.63/90,409.68 = 53,378.01/x
  3. Step 3: Cross multiply
    65,475.63x = 90,409.68 × 53,378.01
  4. Step 4: Simplify right side
    65,475.63x = 4,825,888,803.14
  5. Step 5: Solve for x
    x = 4,825,888,803.14/65,475.63
  6. Step 6: Final answer
    x = 73,705.11

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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.