Home / 115,587.81-159,262.20-77,796.45

Finding the Fourth Proportional to 115,587.81, 159,262.20 and 77,796.45

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Solution

The fourth proportional to 115,587.81, 159,262.20 and 77,796.45 is: 107,191.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,587.81 : 159,262.20 = 77,796.45 : x
  2. Step 2: Convert to fraction form
    115,587.81/159,262.20 = 77,796.45/x
  3. Step 3: Cross multiply
    115,587.81x = 159,262.20 × 77,796.45
  4. Step 4: Simplify right side
    115,587.81x = 12,390,033,779.19
  5. Step 5: Solve for x
    x = 12,390,033,779.19/115,587.81
  6. Step 6: Final answer
    x = 107,191.53

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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.