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Finding the Fourth Proportional to 64,987.40, 89,724.30 and 53,079.32

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Solution

The fourth proportional to 64,987.40, 89,724.30 and 53,079.32 is: 73,283.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,987.40 : 89,724.30 = 53,079.32 : x
  2. Step 2: Convert to fraction form
    64,987.40/89,724.30 = 53,079.32/x
  3. Step 3: Cross multiply
    64,987.40x = 89,724.30 × 53,079.32
  4. Step 4: Simplify right side
    64,987.40x = 4,762,504,831.48
  5. Step 5: Solve for x
    x = 4,762,504,831.48/64,987.40
  6. Step 6: Final answer
    x = 73,283.51

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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.