Home / 81,307.10-121,996.86-51,717.26

Finding the Fourth Proportional to 81,307.10, 121,996.86 and 51,717.26

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Solution

The fourth proportional to 81,307.10, 121,996.86 and 51,717.26 is: 77,598.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,307.10 : 121,996.86 = 51,717.26 : x
  2. Step 2: Convert to fraction form
    81,307.10/121,996.86 = 51,717.26/x
  3. Step 3: Cross multiply
    81,307.10x = 121,996.86 × 51,717.26
  4. Step 4: Simplify right side
    81,307.10x = 6,309,343,327.80
  5. Step 5: Solve for x
    x = 6,309,343,327.80/81,307.10
  6. Step 6: Final answer
    x = 77,598.92

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1.5x scale

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.