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Finding the Fourth Proportional to 153,840.75, 212,307.53 and 86,772.75

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Solution

The fourth proportional to 153,840.75, 212,307.53 and 86,772.75 is: 119,750.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,840.75 : 212,307.53 = 86,772.75 : x
  2. Step 2: Convert to fraction form
    153,840.75/212,307.53 = 86,772.75/x
  3. Step 3: Cross multiply
    153,840.75x = 212,307.53 × 86,772.75
  4. Step 4: Simplify right side
    153,840.75x = 18,422,507,789.94
  5. Step 5: Solve for x
    x = 18,422,507,789.94/153,840.75
  6. Step 6: Final answer
    x = 119,750.51

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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.