Home / 157,931.64-217,945.78-86,311.67

Finding the Fourth Proportional to 157,931.64, 217,945.78 and 86,311.67

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Solution

The fourth proportional to 157,931.64, 217,945.78 and 86,311.67 is: 119,110.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,931.64 : 217,945.78 = 86,311.67 : x
  2. Step 2: Convert to fraction form
    157,931.64/217,945.78 = 86,311.67/x
  3. Step 3: Cross multiply
    157,931.64x = 217,945.78 × 86,311.67
  4. Step 4: Simplify right side
    157,931.64x = 18,811,262,719.97
  5. Step 5: Solve for x
    x = 18,811,262,719.97/157,931.64
  6. Step 6: Final answer
    x = 119,110.16

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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.