Home / 138,779.64-191,516.40-75,117.36

Finding the Fourth Proportional to 138,779.64, 191,516.40 and 75,117.36

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Solution

The fourth proportional to 138,779.64, 191,516.40 and 75,117.36 is: 103,662.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,779.64 : 191,516.40 = 75,117.36 : x
  2. Step 2: Convert to fraction form
    138,779.64/191,516.40 = 75,117.36/x
  3. Step 3: Cross multiply
    138,779.64x = 191,516.40 × 75,117.36
  4. Step 4: Simplify right side
    138,779.64x = 14,386,206,364.70
  5. Step 5: Solve for x
    x = 14,386,206,364.70/138,779.64
  6. Step 6: Final answer
    x = 103,662.23

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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.