Home / 287,380,016.80-431,070,025.20-82,914,762.40

Finding the Fourth Proportional to 287,380,016.80, 431,070,025.20 and 82,914,762.40

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Solution

The fourth proportional to 287,380,016.80, 431,070,025.20 and 82,914,762.40 is: 124,372,143.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,380,016.80 : 431,070,025.20 = 82,914,762.40 : x
  2. Step 2: Convert to fraction form
    287,380,016.80/431,070,025.20 = 82,914,762.40/x
  3. Step 3: Cross multiply
    287,380,016.80x = 431,070,025.20 × 82,914,762.40
  4. Step 4: Simplify right side
    287,380,016.80x = 35,742,068,717,220,016
  5. Step 5: Solve for x
    x = 35,742,068,717,220,016/287,380,016.80
  6. Step 6: Final answer
    x = 124,372,143.60

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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.