Home / 58,987.29-81,420.25-40,135.35

Finding the Fourth Proportional to 58,987.29, 81,420.25 and 40,135.35

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Solution

The fourth proportional to 58,987.29, 81,420.25 and 40,135.35 is: 55,398.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,987.29 : 81,420.25 = 40,135.35 : x
  2. Step 2: Convert to fraction form
    58,987.29/81,420.25 = 40,135.35/x
  3. Step 3: Cross multiply
    58,987.29x = 81,420.25 × 40,135.35
  4. Step 4: Simplify right side
    58,987.29x = 3,267,830,230.84
  5. Step 5: Solve for x
    x = 3,267,830,230.84/58,987.29
  6. Step 6: Final answer
    x = 55,398.89

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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.