Home / 115,931.04-159,990.78-64,940.70

Finding the Fourth Proportional to 115,931.04, 159,990.78 and 64,940.70

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Solution

The fourth proportional to 115,931.04, 159,990.78 and 64,940.70 is: 89,621.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,931.04 : 159,990.78 = 64,940.70 : x
  2. Step 2: Convert to fraction form
    115,931.04/159,990.78 = 64,940.70/x
  3. Step 3: Cross multiply
    115,931.04x = 159,990.78 × 64,940.70
  4. Step 4: Simplify right side
    115,931.04x = 10,389,913,246.75
  5. Step 5: Solve for x
    x = 10,389,913,246.75/115,931.04
  6. Step 6: Final answer
    x = 89,621.50

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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.