Home / 387,386.28-581,089.79-121,146.79

Finding the Fourth Proportional to 387,386.28, 581,089.79 and 121,146.79

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Solution

The fourth proportional to 387,386.28, 581,089.79 and 121,146.79 is: 181,723.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,386.28 : 581,089.79 = 121,146.79 : x
  2. Step 2: Convert to fraction form
    387,386.28/581,089.79 = 121,146.79/x
  3. Step 3: Cross multiply
    387,386.28x = 581,089.79 × 121,146.79
  4. Step 4: Simplify right side
    387,386.28x = 70,397,159,854.83
  5. Step 5: Solve for x
    x = 70,397,159,854.83/387,386.28
  6. Step 6: Final answer
    x = 181,723.42

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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.