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Finding the Fourth Proportional to 297,120.76, 445,637.30 and 86,702.20

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Solution

The fourth proportional to 297,120.76, 445,637.30 and 86,702.20 is: 130,040.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,120.76 : 445,637.30 = 86,702.20 : x
  2. Step 2: Convert to fraction form
    297,120.76/445,637.30 = 86,702.20/x
  3. Step 3: Cross multiply
    297,120.76x = 445,637.30 × 86,702.20
  4. Step 4: Simplify right side
    297,120.76x = 38,637,734,312.06
  5. Step 5: Solve for x
    x = 38,637,734,312.06/297,120.76
  6. Step 6: Final answer
    x = 130,040.51

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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.