Home / 98,855.01-136,409.67-55,830.78

Finding the Fourth Proportional to 98,855.01, 136,409.67 and 55,830.78

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Solution

The fourth proportional to 98,855.01, 136,409.67 and 55,830.78 is: 77,040.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,855.01 : 136,409.67 = 55,830.78 : x
  2. Step 2: Convert to fraction form
    98,855.01/136,409.67 = 55,830.78/x
  3. Step 3: Cross multiply
    98,855.01x = 136,409.67 × 55,830.78
  4. Step 4: Simplify right side
    98,855.01x = 7,615,858,275.64
  5. Step 5: Solve for x
    x = 7,615,858,275.64/98,855.01
  6. Step 6: Final answer
    x = 77,040.69

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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.