Home / 86,018,773.40-128,878,860.90-80,644,002.20

Finding the Fourth Proportional to 86,018,773.40, 128,878,860.90 and 80,644,002.20

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Solution

The fourth proportional to 86,018,773.40, 128,878,860.90 and 80,644,002.20 is: 120,826,032.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,018,773.40 : 128,878,860.90 = 80,644,002.20 : x
  2. Step 2: Convert to fraction form
    86,018,773.40/128,878,860.90 = 80,644,002.20/x
  3. Step 3: Cross multiply
    86,018,773.40x = 128,878,860.90 × 80,644,002.20
  4. Step 4: Simplify right side
    86,018,773.40x = 10,393,307,141,953,094
  5. Step 5: Solve for x
    x = 10,393,307,141,953,094/86,018,773.40
  6. Step 6: Final answer
    x = 120,826,032.87

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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.