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Finding the Fourth Proportional to 144,361,985.40, 216,542,978.10 and 86,966,357.40

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Solution

The fourth proportional to 144,361,985.40, 216,542,978.10 and 86,966,357.40 is: 130,449,536.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,361,985.40 : 216,542,978.10 = 86,966,357.40 : x
  2. Step 2: Convert to fraction form
    144,361,985.40/216,542,978.10 = 86,966,357.40/x
  3. Step 3: Cross multiply
    144,361,985.40x = 216,542,978.10 × 86,966,357.40
  4. Step 4: Simplify right side
    144,361,985.40x = 18,831,954,025,904,972
  5. Step 5: Solve for x
    x = 18,831,954,025,904,972/144,361,985.40
  6. Step 6: Final answer
    x = 130,449,536.10

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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.