Home / 87,985.80-121,421.28-47,699.46

Finding the Fourth Proportional to 87,985.80, 121,421.28 and 47,699.46

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Solution

The fourth proportional to 87,985.80, 121,421.28 and 47,699.46 is: 65,825.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,985.80 : 121,421.28 = 47,699.46 : x
  2. Step 2: Convert to fraction form
    87,985.80/121,421.28 = 47,699.46/x
  3. Step 3: Cross multiply
    87,985.80x = 121,421.28 × 47,699.46
  4. Step 4: Simplify right side
    87,985.80x = 5,791,729,488.51
  5. Step 5: Solve for x
    x = 5,791,729,488.51/87,985.80
  6. Step 6: Final answer
    x = 65,825.73

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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.