Home / 86,018,772.40-128,878,859.40-80,644,001.20

Finding the Fourth Proportional to 86,018,772.40, 128,878,859.40 and 80,644,001.20

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Solution

The fourth proportional to 86,018,772.40, 128,878,859.40 and 80,644,001.20 is: 120,826,031.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,018,772.40 : 128,878,859.40 = 80,644,001.20 : x
  2. Step 2: Convert to fraction form
    86,018,772.40/128,878,859.40 = 80,644,001.20/x
  3. Step 3: Cross multiply
    86,018,772.40x = 128,878,859.40 × 80,644,001.20
  4. Step 4: Simplify right side
    86,018,772.40x = 10,393,306,892,108,232
  5. Step 5: Solve for x
    x = 10,393,306,892,108,232/86,018,772.40
  6. Step 6: Final answer
    x = 120,826,031.37

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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.