Home / 287,380,007.80-431,070,011.70-82,914,753.40

Finding the Fourth Proportional to 287,380,007.80, 431,070,011.70 and 82,914,753.40

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Solution

The fourth proportional to 287,380,007.80, 431,070,011.70 and 82,914,753.40 is: 124,372,130.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,380,007.80 : 431,070,011.70 = 82,914,753.40 : x
  2. Step 2: Convert to fraction form
    287,380,007.80/431,070,011.70 = 82,914,753.40/x
  3. Step 3: Cross multiply
    287,380,007.80x = 431,070,011.70 × 82,914,753.40
  4. Step 4: Simplify right side
    287,380,007.80x = 35,742,063,718,240,616
  5. Step 5: Solve for x
    x = 35,742,063,718,240,616/287,380,007.80
  6. Step 6: Final answer
    x = 124,372,130.10

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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.