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Finding the Fourth Proportional to 70,953,891.20, 106,430,836.80 and 25,509,780.80

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Solution

The fourth proportional to 70,953,891.20, 106,430,836.80 and 25,509,780.80 is: 38,264,671.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,953,891.20 : 106,430,836.80 = 25,509,780.80 : x
  2. Step 2: Convert to fraction form
    70,953,891.20/106,430,836.80 = 25,509,780.80/x
  3. Step 3: Cross multiply
    70,953,891.20x = 106,430,836.80 × 25,509,780.80
  4. Step 4: Simplify right side
    70,953,891.20x = 2,715,027,317,128,573.50
  5. Step 5: Solve for x
    x = 2,715,027,317,128,573.50/70,953,891.20
  6. Step 6: Final answer
    x = 38,264,671.20

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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.