Home / 387,708.08-581,561.40-121,489

Finding the Fourth Proportional to 387,708.08, 581,561.40 and 121,489

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Solution

The fourth proportional to 387,708.08, 581,561.40 and 121,489 is: 182,233.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,708.08 : 581,561.40 = 121,489 : x
  2. Step 2: Convert to fraction form
    387,708.08/581,561.40 = 121,489/x
  3. Step 3: Cross multiply
    387,708.08x = 581,561.40 × 121,489
  4. Step 4: Simplify right side
    387,708.08x = 70,653,312,924.60
  5. Step 5: Solve for x
    x = 70,653,312,924.60/387,708.08
  6. Step 6: Final answer
    x = 182,233.27

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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.