Home / 86,018,775.40-128,878,863.90-80,644,004.20

Finding the Fourth Proportional to 86,018,775.40, 128,878,863.90 and 80,644,004.20

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Solution

The fourth proportional to 86,018,775.40, 128,878,863.90 and 80,644,004.20 is: 120,826,035.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,018,775.40 : 128,878,863.90 = 80,644,004.20 : x
  2. Step 2: Convert to fraction form
    86,018,775.40/128,878,863.90 = 80,644,004.20/x
  3. Step 3: Cross multiply
    86,018,775.40x = 128,878,863.90 × 80,644,004.20
  4. Step 4: Simplify right side
    86,018,775.40x = 10,393,307,641,642,830
  5. Step 5: Solve for x
    x = 10,393,307,641,642,830/86,018,775.40
  6. Step 6: Final answer
    x = 120,826,035.87

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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.