Home / 139,878.06-193,031.74-76,215.86

Finding the Fourth Proportional to 139,878.06, 193,031.74 and 76,215.86

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Solution

The fourth proportional to 139,878.06, 193,031.74 and 76,215.86 is: 105,177.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,878.06 : 193,031.74 = 76,215.86 : x
  2. Step 2: Convert to fraction form
    139,878.06/193,031.74 = 76,215.86/x
  3. Step 3: Cross multiply
    139,878.06x = 193,031.74 × 76,215.86
  4. Step 4: Simplify right side
    139,878.06x = 14,712,080,071.40
  5. Step 5: Solve for x
    x = 14,712,080,071.40/139,878.06
  6. Step 6: Final answer
    x = 105,177.90

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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.