Home / 257,641.31-386,488.47-89,161.35

Finding the Fourth Proportional to 257,641.31, 386,488.47 and 89,161.35

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Solution

The fourth proportional to 257,641.31, 386,488.47 and 89,161.35 is: 133,751.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,641.31 : 386,488.47 = 89,161.35 : x
  2. Step 2: Convert to fraction form
    257,641.31/386,488.47 = 89,161.35/x
  3. Step 3: Cross multiply
    257,641.31x = 386,488.47 × 89,161.35
  4. Step 4: Simplify right side
    257,641.31x = 34,459,833,744.63
  5. Step 5: Solve for x
    x = 34,459,833,744.63/257,641.31
  6. Step 6: Final answer
    x = 133,751.20

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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.