Home / 103,212.57-142,421.95-57,881.22

Finding the Fourth Proportional to 103,212.57, 142,421.95 and 57,881.22

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Solution

The fourth proportional to 103,212.57, 142,421.95 and 57,881.22 is: 79,869.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,212.57 : 142,421.95 = 57,881.22 : x
  2. Step 2: Convert to fraction form
    103,212.57/142,421.95 = 57,881.22/x
  3. Step 3: Cross multiply
    103,212.57x = 142,421.95 × 57,881.22
  4. Step 4: Simplify right side
    103,212.57x = 8,243,556,220.78
  5. Step 5: Solve for x
    x = 8,243,556,220.78/103,212.57
  6. Step 6: Final answer
    x = 79,869.69

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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.