Home / 387,811.20-581,716.80-103,501.20

Finding the Fourth Proportional to 387,811.20, 581,716.80 and 103,501.20

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Solution

The fourth proportional to 387,811.20, 581,716.80 and 103,501.20 is: 155,251.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,811.20 : 581,716.80 = 103,501.20 : x
  2. Step 2: Convert to fraction form
    387,811.20/581,716.80 = 103,501.20/x
  3. Step 3: Cross multiply
    387,811.20x = 581,716.80 × 103,501.20
  4. Step 4: Simplify right side
    387,811.20x = 60,208,386,860.16
  5. Step 5: Solve for x
    x = 60,208,386,860.16/387,811.20
  6. Step 6: Final answer
    x = 155,251.80

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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.