Home / 287,380,012.80-431,070,019.20-82,914,758.40

Finding the Fourth Proportional to 287,380,012.80, 431,070,019.20 and 82,914,758.40

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Solution

The fourth proportional to 287,380,012.80, 431,070,019.20 and 82,914,758.40 is: 124,372,137.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,380,012.80 : 431,070,019.20 = 82,914,758.40 : x
  2. Step 2: Convert to fraction form
    287,380,012.80/431,070,019.20 = 82,914,758.40/x
  3. Step 3: Cross multiply
    287,380,012.80x = 431,070,019.20 × 82,914,758.40
  4. Step 4: Simplify right side
    287,380,012.80x = 35,742,066,495,451,364
  5. Step 5: Solve for x
    x = 35,742,066,495,451,364/287,380,012.80
  6. Step 6: Final answer
    x = 124,372,137.60

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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.