Home / 153,874.28-212,345.93-85,890.66

Finding the Fourth Proportional to 153,874.28, 212,345.93 and 85,890.66

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Solution

The fourth proportional to 153,874.28, 212,345.93 and 85,890.66 is: 118,528.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,874.28 : 212,345.93 = 85,890.66 : x
  2. Step 2: Convert to fraction form
    153,874.28/212,345.93 = 85,890.66/x
  3. Step 3: Cross multiply
    153,874.28x = 212,345.93 × 85,890.66
  4. Step 4: Simplify right side
    153,874.28x = 18,238,531,551.49
  5. Step 5: Solve for x
    x = 18,238,531,551.49/153,874.28
  6. Step 6: Final answer
    x = 118,528.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.