Home / 387,820,485.71-581,687,756.50-138,815,798.07

Finding the Fourth Proportional to 387,820,485.71, 581,687,756.50 and 138,815,798.07

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Solution

The fourth proportional to 387,820,485.71, 581,687,756.50 and 138,815,798.07 is: 208,208,315.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,820,485.71 : 581,687,756.50 = 138,815,798.07 : x
  2. Step 2: Convert to fraction form
    387,820,485.71/581,687,756.50 = 138,815,798.07/x
  3. Step 3: Cross multiply
    387,820,485.71x = 581,687,756.50 × 138,815,798.07
  4. Step 4: Simplify right side
    387,820,485.71x = 80,747,450,142,839,840
  5. Step 5: Solve for x
    x = 80,747,450,142,839,840/387,820,485.71
  6. Step 6: Final answer
    x = 208,208,315.75

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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.