Home / 81,130.07-121,685.88-21,970.35

Finding the Fourth Proportional to 81,130.07, 121,685.88 and 21,970.35

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Solution

The fourth proportional to 81,130.07, 121,685.88 and 21,970.35 is: 32,953.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,130.07 : 121,685.88 = 21,970.35 : x
  2. Step 2: Convert to fraction form
    81,130.07/121,685.88 = 21,970.35/x
  3. Step 3: Cross multiply
    81,130.07x = 121,685.88 × 21,970.35
  4. Step 4: Simplify right side
    81,130.07x = 2,673,481,457.24
  5. Step 5: Solve for x
    x = 2,673,481,457.24/81,130.07
  6. Step 6: Final answer
    x = 32,953.03

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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.