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Finding the Fourth Proportional to 121,581.81, 167,782.25 and 70,607.07

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Solution

The fourth proportional to 121,581.81, 167,782.25 and 70,607.07 is: 97,437.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,581.81 : 167,782.25 = 70,607.07 : x
  2. Step 2: Convert to fraction form
    121,581.81/167,782.25 = 70,607.07/x
  3. Step 3: Cross multiply
    121,581.81x = 167,782.25 × 70,607.07
  4. Step 4: Simplify right side
    121,581.81x = 11,846,612,717.47
  5. Step 5: Solve for x
    x = 11,846,612,717.47/121,581.81
  6. Step 6: Final answer
    x = 97,437.38

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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.