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Finding the Fourth Proportional to 153,087.44, 211,264.20 and 86,020.56

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Solution

The fourth proportional to 153,087.44, 211,264.20 and 86,020.56 is: 118,710.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,087.44 : 211,264.20 = 86,020.56 : x
  2. Step 2: Convert to fraction form
    153,087.44/211,264.20 = 86,020.56/x
  3. Step 3: Cross multiply
    153,087.44x = 211,264.20 × 86,020.56
  4. Step 4: Simplify right side
    153,087.44x = 18,173,064,791.95
  5. Step 5: Solve for x
    x = 18,173,064,791.95/153,087.44
  6. Step 6: Final answer
    x = 118,710.36

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1.5x scale

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.