Home / 87,902-121,320.36-84,985.52

Finding the Fourth Proportional to 87,902, 121,320.36 and 84,985.52

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Solution

The fourth proportional to 87,902, 121,320.36 and 84,985.52 is: 117,295.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,902 : 121,320.36 = 84,985.52 : x
  2. Step 2: Convert to fraction form
    87,902/121,320.36 = 84,985.52/x
  3. Step 3: Cross multiply
    87,902x = 121,320.36 × 84,985.52
  4. Step 4: Simplify right side
    87,902x = 10,310,473,881.19
  5. Step 5: Solve for x
    x = 10,310,473,881.19/87,902
  6. Step 6: Final answer
    x = 117,295.10

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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.