Home / 105,078.42-145,008.69-57,332.77

Finding the Fourth Proportional to 105,078.42, 145,008.69 and 57,332.77

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Solution

The fourth proportional to 105,078.42, 145,008.69 and 57,332.77 is: 79,119.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,078.42 : 145,008.69 = 57,332.77 : x
  2. Step 2: Convert to fraction form
    105,078.42/145,008.69 = 57,332.77/x
  3. Step 3: Cross multiply
    105,078.42x = 145,008.69 × 57,332.77
  4. Step 4: Simplify right side
    105,078.42x = 8,313,749,871.77
  5. Step 5: Solve for x
    x = 8,313,749,871.77/105,078.42
  6. Step 6: Final answer
    x = 79,119.48

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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.