Home / 287,874,048.20-431,811,055.89-80,643,140.33

Finding the Fourth Proportional to 287,874,048.20, 431,811,055.89 and 80,643,140.33

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Solution

The fourth proportional to 287,874,048.20, 431,811,055.89 and 80,643,140.33 is: 120,964,705.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,874,048.20 : 431,811,055.89 = 80,643,140.33 : x
  2. Step 2: Convert to fraction form
    287,874,048.20/431,811,055.89 = 80,643,140.33/x
  3. Step 3: Cross multiply
    287,874,048.20x = 431,811,055.89 × 80,643,140.33
  4. Step 4: Simplify right side
    287,874,048.20x = 34,822,599,574,023,688
  5. Step 5: Solve for x
    x = 34,822,599,574,023,688/287,874,048.20
  6. Step 6: Final answer
    x = 120,964,705.89

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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.