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Finding the Fourth Proportional to 64,990.64, 89,687.06 and 36,698.16

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Solution

The fourth proportional to 64,990.64, 89,687.06 and 36,698.16 is: 50,643.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,990.64 : 89,687.06 = 36,698.16 : x
  2. Step 2: Convert to fraction form
    64,990.64/89,687.06 = 36,698.16/x
  3. Step 3: Cross multiply
    64,990.64x = 89,687.06 × 36,698.16
  4. Step 4: Simplify right side
    64,990.64x = 3,291,350,077.81
  5. Step 5: Solve for x
    x = 3,291,350,077.81/64,990.64
  6. Step 6: Final answer
    x = 50,643.45

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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.