Home / 105,403.80-145,457.28-57,661.56

Finding the Fourth Proportional to 105,403.80, 145,457.28 and 57,661.56

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Solution

The fourth proportional to 105,403.80, 145,457.28 and 57,661.56 is: 79,572.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,403.80 : 145,457.28 = 57,661.56 : x
  2. Step 2: Convert to fraction form
    105,403.80/145,457.28 = 57,661.56/x
  3. Step 3: Cross multiply
    105,403.80x = 145,457.28 × 57,661.56
  4. Step 4: Simplify right side
    105,403.80x = 8,387,293,678.16
  5. Step 5: Solve for x
    x = 8,387,293,678.16/105,403.80
  6. Step 6: Final answer
    x = 79,572.97

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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.