Home / 136,818.08-188,812.72-76,386.40

Finding the Fourth Proportional to 136,818.08, 188,812.72 and 76,386.40

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Solution

The fourth proportional to 136,818.08, 188,812.72 and 76,386.40 is: 105,415.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,818.08 : 188,812.72 = 76,386.40 : x
  2. Step 2: Convert to fraction form
    136,818.08/188,812.72 = 76,386.40/x
  3. Step 3: Cross multiply
    136,818.08x = 188,812.72 × 76,386.40
  4. Step 4: Simplify right side
    136,818.08x = 14,422,723,955.01
  5. Step 5: Solve for x
    x = 14,422,723,955.01/136,818.08
  6. Step 6: Final answer
    x = 105,415.34

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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.