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Finding the Fourth Proportional to 64,972.70, 89,661.36 and 36,292.76

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Solution

The fourth proportional to 64,972.70, 89,661.36 and 36,292.76 is: 50,083.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,972.70 : 89,661.36 = 36,292.76 : x
  2. Step 2: Convert to fraction form
    64,972.70/89,661.36 = 36,292.76/x
  3. Step 3: Cross multiply
    64,972.70x = 89,661.36 × 36,292.76
  4. Step 4: Simplify right side
    64,972.70x = 3,254,058,038.29
  5. Step 5: Solve for x
    x = 3,254,058,038.29/64,972.70
  6. Step 6: Final answer
    x = 50,083.47

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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.