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Finding the Fourth Proportional to 159,363,859.80, 239,045,789.70 and 145,758,970.20

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Solution

The fourth proportional to 159,363,859.80, 239,045,789.70 and 145,758,970.20 is: 218,638,455.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,363,859.80 : 239,045,789.70 = 145,758,970.20 : x
  2. Step 2: Convert to fraction form
    159,363,859.80/239,045,789.70 = 145,758,970.20/x
  3. Step 3: Cross multiply
    159,363,859.80x = 239,045,789.70 × 145,758,970.20
  4. Step 4: Simplify right side
    159,363,859.80x = 34,843,068,137,317,764
  5. Step 5: Solve for x
    x = 34,843,068,137,317,764/159,363,859.80
  6. Step 6: Final answer
    x = 218,638,455.30

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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.