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Finding the Fourth Proportional to 153,119.95, 229,710.58 and 85,747.79

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Solution

The fourth proportional to 153,119.95, 229,710.58 and 85,747.79 is: 128,638.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,119.95 : 229,710.58 = 85,747.79 : x
  2. Step 2: Convert to fraction form
    153,119.95/229,710.58 = 85,747.79/x
  3. Step 3: Cross multiply
    153,119.95x = 229,710.58 × 85,747.79
  4. Step 4: Simplify right side
    153,119.95x = 19,697,175,927.95
  5. Step 5: Solve for x
    x = 19,697,175,927.95/153,119.95
  6. Step 6: Final answer
    x = 128,638.86

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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.