Home / 86,018,823.20-129,028,234.80-79,449,658.40

Finding the Fourth Proportional to 86,018,823.20, 129,028,234.80 and 79,449,658.40

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Solution

The fourth proportional to 86,018,823.20, 129,028,234.80 and 79,449,658.40 is: 119,174,487.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,018,823.20 : 129,028,234.80 = 79,449,658.40 : x
  2. Step 2: Convert to fraction form
    86,018,823.20/129,028,234.80 = 79,449,658.40/x
  3. Step 3: Cross multiply
    86,018,823.20x = 129,028,234.80 × 79,449,658.40
  4. Step 4: Simplify right side
    86,018,823.20x = 10,251,249,178,814,992
  5. Step 5: Solve for x
    x = 10,251,249,178,814,992/86,018,823.20
  6. Step 6: Final answer
    x = 119,174,487.60

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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.