Home / 139,878.08-193,029.32-76,216.40

Finding the Fourth Proportional to 139,878.08, 193,029.32 and 76,216.40

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Solution

The fourth proportional to 139,878.08, 193,029.32 and 76,216.40 is: 105,177.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,878.08 : 193,029.32 = 76,216.40 : x
  2. Step 2: Convert to fraction form
    139,878.08/193,029.32 = 76,216.40/x
  3. Step 3: Cross multiply
    139,878.08x = 193,029.32 × 76,216.40
  4. Step 4: Simplify right side
    139,878.08x = 14,711,999,864.85
  5. Step 5: Solve for x
    x = 14,711,999,864.85/139,878.08
  6. Step 6: Final answer
    x = 105,177.31

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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.