Home / 75,417.36-103,979.88-47,112.72

Finding the Fourth Proportional to 75,417.36, 103,979.88 and 47,112.72

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Solution

The fourth proportional to 75,417.36, 103,979.88 and 47,112.72 is: 64,955.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,417.36 : 103,979.88 = 47,112.72 : x
  2. Step 2: Convert to fraction form
    75,417.36/103,979.88 = 47,112.72/x
  3. Step 3: Cross multiply
    75,417.36x = 103,979.88 × 47,112.72
  4. Step 4: Simplify right side
    75,417.36x = 4,898,774,972.07
  5. Step 5: Solve for x
    x = 4,898,774,972.07/75,417.36
  6. Step 6: Final answer
    x = 64,955.54

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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.