Home / 115,015.78-158,710.89-64,711.54

Finding the Fourth Proportional to 115,015.78, 158,710.89 and 64,711.54

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Solution

The fourth proportional to 115,015.78, 158,710.89 and 64,711.54 is: 89,295.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,015.78 : 158,710.89 = 64,711.54 : x
  2. Step 2: Convert to fraction form
    115,015.78/158,710.89 = 64,711.54/x
  3. Step 3: Cross multiply
    115,015.78x = 158,710.89 × 64,711.54
  4. Step 4: Simplify right side
    115,015.78x = 10,270,426,106.67
  5. Step 5: Solve for x
    x = 10,270,426,106.67/115,015.78
  6. Step 6: Final answer
    x = 89,295.80

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1.5x scale

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.