Home / 287,874,051.20-431,811,060.40-80,643,143.32

Finding the Fourth Proportional to 287,874,051.20, 431,811,060.40 and 80,643,143.32

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Solution

The fourth proportional to 287,874,051.20, 431,811,060.40 and 80,643,143.32 is: 120,964,710.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,874,051.20 : 431,811,060.40 = 80,643,143.32 : x
  2. Step 2: Convert to fraction form
    287,874,051.20/431,811,060.40 = 80,643,143.32/x
  3. Step 3: Cross multiply
    287,874,051.20x = 431,811,060.40 × 80,643,143.32
  4. Step 4: Simplify right side
    287,874,051.20x = 34,822,601,230,998,372
  5. Step 5: Solve for x
    x = 34,822,601,230,998,372/287,874,051.20
  6. Step 6: Final answer
    x = 120,964,710.39

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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.