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Finding the Fourth Proportional to 89,970.84, 124,134.72 and 51,728.28

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Solution

The fourth proportional to 89,970.84, 124,134.72 and 51,728.28 is: 71,370.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,970.84 : 124,134.72 = 51,728.28 : x
  2. Step 2: Convert to fraction form
    89,970.84/124,134.72 = 51,728.28/x
  3. Step 3: Cross multiply
    89,970.84x = 124,134.72 × 51,728.28
  4. Step 4: Simplify right side
    89,970.84x = 6,421,275,553.88
  5. Step 5: Solve for x
    x = 6,421,275,553.88/89,970.84
  6. Step 6: Final answer
    x = 71,370.63

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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.