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Finding the Fourth Proportional to 207,021.12, 310,531.34 and 64,877.34

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Solution

The fourth proportional to 207,021.12, 310,531.34 and 64,877.34 is: 97,315.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,021.12 : 310,531.34 = 64,877.34 : x
  2. Step 2: Convert to fraction form
    207,021.12/310,531.34 = 64,877.34/x
  3. Step 3: Cross multiply
    207,021.12x = 310,531.34 × 64,877.34
  4. Step 4: Simplify right side
    207,021.12x = 20,146,447,001.45
  5. Step 5: Solve for x
    x = 20,146,447,001.45/207,021.12
  6. Step 6: Final answer
    x = 97,315.90

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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.