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Finding the Fourth Proportional to 100,963.55, 151,281.30 and 86,857.40

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Solution

The fourth proportional to 100,963.55, 151,281.30 and 86,857.40 is: 130,144.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,963.55 : 151,281.30 = 86,857.40 : x
  2. Step 2: Convert to fraction form
    100,963.55/151,281.30 = 86,857.40/x
  3. Step 3: Cross multiply
    100,963.55x = 151,281.30 × 86,857.40
  4. Step 4: Simplify right side
    100,963.55x = 13,139,900,386.62
  5. Step 5: Solve for x
    x = 13,139,900,386.62/100,963.55
  6. Step 6: Final answer
    x = 130,144.99

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1.5x scale

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.