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Finding the Fourth Proportional to 86,905.40, 130,358.10 and 55,801.40

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Solution

The fourth proportional to 86,905.40, 130,358.10 and 55,801.40 is: 83,702.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,905.40 : 130,358.10 = 55,801.40 : x
  2. Step 2: Convert to fraction form
    86,905.40/130,358.10 = 55,801.40/x
  3. Step 3: Cross multiply
    86,905.40x = 130,358.10 × 55,801.40
  4. Step 4: Simplify right side
    86,905.40x = 7,274,164,481.34
  5. Step 5: Solve for x
    x = 7,274,164,481.34/86,905.40
  6. Step 6: Final answer
    x = 83,702.10

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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.