Home / 218,907,780.80-328,145,095.20-103,689,809.60

Finding the Fourth Proportional to 218,907,780.80, 328,145,095.20 and 103,689,809.60

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Solution

The fourth proportional to 218,907,780.80, 328,145,095.20 and 103,689,809.60 is: 155,432,129.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,907,780.80 : 328,145,095.20 = 103,689,809.60 : x
  2. Step 2: Convert to fraction form
    218,907,780.80/328,145,095.20 = 103,689,809.60/x
  3. Step 3: Cross multiply
    218,907,780.80x = 328,145,095.20 × 103,689,809.60
  4. Step 4: Simplify right side
    218,907,780.80x = 34,025,302,442,461,872
  5. Step 5: Solve for x
    x = 34,025,302,442,461,872/218,907,780.80
  6. Step 6: Final answer
    x = 155,432,129.08

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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.