Home / 142,167.51-213,281.33-53,421.78

Finding the Fourth Proportional to 142,167.51, 213,281.33 and 53,421.78

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Solution

The fourth proportional to 142,167.51, 213,281.33 and 53,421.78 is: 80,143.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,167.51 : 213,281.33 = 53,421.78 : x
  2. Step 2: Convert to fraction form
    142,167.51/213,281.33 = 53,421.78/x
  3. Step 3: Cross multiply
    142,167.51x = 213,281.33 × 53,421.78
  4. Step 4: Simplify right side
    142,167.51x = 11,393,868,289.37
  5. Step 5: Solve for x
    x = 11,393,868,289.37/142,167.51
  6. Step 6: Final answer
    x = 80,143.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.