Home / 121,647.78-167,815.65-76,303.02

Finding the Fourth Proportional to 121,647.78, 167,815.65 and 76,303.02

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Solution

The fourth proportional to 121,647.78, 167,815.65 and 76,303.02 is: 105,261.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,647.78 : 167,815.65 = 76,303.02 : x
  2. Step 2: Convert to fraction form
    121,647.78/167,815.65 = 76,303.02/x
  3. Step 3: Cross multiply
    121,647.78x = 167,815.65 × 76,303.02
  4. Step 4: Simplify right side
    121,647.78x = 12,804,840,898.26
  5. Step 5: Solve for x
    x = 12,804,840,898.26/121,647.78
  6. Step 6: Final answer
    x = 105,261.61

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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.