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Finding the Fourth Proportional to 143,962.50, 216,021.51 and 70,090.50

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Solution

The fourth proportional to 143,962.50, 216,021.51 and 70,090.50 is: 105,173.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,962.50 : 216,021.51 = 70,090.50 : x
  2. Step 2: Convert to fraction form
    143,962.50/216,021.51 = 70,090.50/x
  3. Step 3: Cross multiply
    143,962.50x = 216,021.51 × 70,090.50
  4. Step 4: Simplify right side
    143,962.50x = 15,141,055,646.66
  5. Step 5: Solve for x
    x = 15,141,055,646.66/143,962.50
  6. Step 6: Final answer
    x = 105,173.61

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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.