Home / 387,437.09-581,139.51-134,774.79

Finding the Fourth Proportional to 387,437.09, 581,139.51 and 134,774.79

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Solution

The fourth proportional to 387,437.09, 581,139.51 and 134,774.79 is: 202,156.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,437.09 : 581,139.51 = 134,774.79 : x
  2. Step 2: Convert to fraction form
    387,437.09/581,139.51 = 134,774.79/x
  3. Step 3: Cross multiply
    387,437.09x = 581,139.51 × 134,774.79
  4. Step 4: Simplify right side
    387,437.09x = 78,322,955,420.95
  5. Step 5: Solve for x
    x = 78,322,955,420.95/387,437.09
  6. Step 6: Final answer
    x = 202,156.58

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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.