Home / 139,905.21-193,062.65-79,474.35

Finding the Fourth Proportional to 139,905.21, 193,062.65 and 79,474.35

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Solution

The fourth proportional to 139,905.21, 193,062.65 and 79,474.35 is: 109,670.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,905.21 : 193,062.65 = 79,474.35 : x
  2. Step 2: Convert to fraction form
    139,905.21/193,062.65 = 79,474.35/x
  3. Step 3: Cross multiply
    139,905.21x = 193,062.65 × 79,474.35
  4. Step 4: Simplify right side
    139,905.21x = 15,343,528,220.66
  5. Step 5: Solve for x
    x = 15,343,528,220.66/139,905.21
  6. Step 6: Final answer
    x = 109,670.89

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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.