Home / 105,490.99-145,579.17-57,748.78

Finding the Fourth Proportional to 105,490.99, 145,579.17 and 57,748.78

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Solution

The fourth proportional to 105,490.99, 145,579.17 and 57,748.78 is: 79,694.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,490.99 : 145,579.17 = 57,748.78 : x
  2. Step 2: Convert to fraction form
    105,490.99/145,579.17 = 57,748.78/x
  3. Step 3: Cross multiply
    105,490.99x = 145,579.17 × 57,748.78
  4. Step 4: Simplify right side
    105,490.99x = 8,407,019,460.91
  5. Step 5: Solve for x
    x = 8,407,019,460.91/105,490.99
  6. Step 6: Final answer
    x = 79,694.19

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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.