Home / 281,182,121.15-388,001,786.87-155,731,030.79

Finding the Fourth Proportional to 281,182,121.15, 388,001,786.87 and 155,731,030.79

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Solution

The fourth proportional to 281,182,121.15, 388,001,786.87 and 155,731,030.79 is: 214,892,461.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,182,121.15 : 388,001,786.87 = 155,731,030.79 : x
  2. Step 2: Convert to fraction form
    281,182,121.15/388,001,786.87 = 155,731,030.79/x
  3. Step 3: Cross multiply
    281,182,121.15x = 388,001,786.87 × 155,731,030.79
  4. Step 4: Simplify right side
    281,182,121.15x = 60,423,918,218,986,312
  5. Step 5: Solve for x
    x = 60,423,918,218,986,312/281,182,121.15
  6. Step 6: Final answer
    x = 214,892,461.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.