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Finding the Fourth Proportional to 103,687.62, 143,132.25 and 70,173.06

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Solution

The fourth proportional to 103,687.62, 143,132.25 and 70,173.06 is: 96,868.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,687.62 : 143,132.25 = 70,173.06 : x
  2. Step 2: Convert to fraction form
    103,687.62/143,132.25 = 70,173.06/x
  3. Step 3: Cross multiply
    103,687.62x = 143,132.25 × 70,173.06
  4. Step 4: Simplify right side
    103,687.62x = 10,044,027,967.19
  5. Step 5: Solve for x
    x = 10,044,027,967.19/103,687.62
  6. Step 6: Final answer
    x = 96,868.15

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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.