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Finding the Fourth Proportional to 153,606.08, 212,016.48 and 100,038.08

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Solution

The fourth proportional to 153,606.08, 212,016.48 and 100,038.08 is: 138,078.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,606.08 : 212,016.48 = 100,038.08 : x
  2. Step 2: Convert to fraction form
    153,606.08/212,016.48 = 100,038.08/x
  3. Step 3: Cross multiply
    153,606.08x = 212,016.48 × 100,038.08
  4. Step 4: Simplify right side
    153,606.08x = 21,209,721,587.56
  5. Step 5: Solve for x
    x = 21,209,721,587.56/153,606.08
  6. Step 6: Final answer
    x = 138,078.66

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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.