Home / 142,381.47-213,466.77-86,208.38

Finding the Fourth Proportional to 142,381.47, 213,466.77 and 86,208.38

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Solution

The fourth proportional to 142,381.47, 213,466.77 and 86,208.38 is: 129,248.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,381.47 : 213,466.77 = 86,208.38 : x
  2. Step 2: Convert to fraction form
    142,381.47/213,466.77 = 86,208.38/x
  3. Step 3: Cross multiply
    142,381.47x = 213,466.77 × 86,208.38
  4. Step 4: Simplify right side
    142,381.47x = 18,402,623,358.20
  5. Step 5: Solve for x
    x = 18,402,623,358.20/142,381.47
  6. Step 6: Final answer
    x = 129,248.72

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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.