Home / 115,727.52-173,412.66-78,140.28

Finding the Fourth Proportional to 115,727.52, 173,412.66 and 78,140.28

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Solution

The fourth proportional to 115,727.52, 173,412.66 and 78,140.28 is: 117,089.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,727.52 : 173,412.66 = 78,140.28 : x
  2. Step 2: Convert to fraction form
    115,727.52/173,412.66 = 78,140.28/x
  3. Step 3: Cross multiply
    115,727.52x = 173,412.66 × 78,140.28
  4. Step 4: Simplify right side
    115,727.52x = 13,550,513,807.94
  5. Step 5: Solve for x
    x = 13,550,513,807.94/115,727.52
  6. Step 6: Final answer
    x = 117,089.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.