Home / 76,905.40-115,102.10-55,785.40

Finding the Fourth Proportional to 76,905.40, 115,102.10 and 55,785.40

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Solution

The fourth proportional to 76,905.40, 115,102.10 and 55,785.40 is: 83,492.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,905.40 : 115,102.10 = 55,785.40 : x
  2. Step 2: Convert to fraction form
    76,905.40/115,102.10 = 55,785.40/x
  3. Step 3: Cross multiply
    76,905.40x = 115,102.10 × 55,785.40
  4. Step 4: Simplify right side
    76,905.40x = 6,421,016,689.34
  5. Step 5: Solve for x
    x = 6,421,016,689.34/76,905.40
  6. Step 6: Final answer
    x = 83,492.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.