Home / 158,711.42-219,021.64-90,729.89

Finding the Fourth Proportional to 158,711.42, 219,021.64 and 90,729.89

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Solution

The fourth proportional to 158,711.42, 219,021.64 and 90,729.89 is: 125,207.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,711.42 : 219,021.64 = 90,729.89 : x
  2. Step 2: Convert to fraction form
    158,711.42/219,021.64 = 90,729.89/x
  3. Step 3: Cross multiply
    158,711.42x = 219,021.64 × 90,729.89
  4. Step 4: Simplify right side
    158,711.42x = 19,871,808,804.22
  5. Step 5: Solve for x
    x = 19,871,808,804.22/158,711.42
  6. Step 6: Final answer
    x = 125,207.18

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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.