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Finding the Fourth Proportional to 153,908.66, 212,514.18 and 118,041.86

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Solution

The fourth proportional to 153,908.66, 212,514.18 and 118,041.86 is: 162,989.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,908.66 : 212,514.18 = 118,041.86 : x
  2. Step 2: Convert to fraction form
    153,908.66/212,514.18 = 118,041.86/x
  3. Step 3: Cross multiply
    153,908.66x = 212,514.18 × 118,041.86
  4. Step 4: Simplify right side
    153,908.66x = 25,085,569,083.57
  5. Step 5: Solve for x
    x = 25,085,569,083.57/153,908.66
  6. Step 6: Final answer
    x = 162,989.98

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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.