Home / 115,320.76-159,142.86-65,019.64

Finding the Fourth Proportional to 115,320.76, 159,142.86 and 65,019.64

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Solution

The fourth proportional to 115,320.76, 159,142.86 and 65,019.64 is: 89,727.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,320.76 : 159,142.86 = 65,019.64 : x
  2. Step 2: Convert to fraction form
    115,320.76/159,142.86 = 65,019.64/x
  3. Step 3: Cross multiply
    115,320.76x = 159,142.86 × 65,019.64
  4. Step 4: Simplify right side
    115,320.76x = 10,347,411,465.77
  5. Step 5: Solve for x
    x = 10,347,411,465.77/115,320.76
  6. Step 6: Final answer
    x = 89,727.22

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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.