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Finding the Fourth Proportional to 64,810.60, 97,215.90 and 21,034.60

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Solution

The fourth proportional to 64,810.60, 97,215.90 and 21,034.60 is: 31,551.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,810.60 : 97,215.90 = 21,034.60 : x
  2. Step 2: Convert to fraction form
    64,810.60/97,215.90 = 21,034.60/x
  3. Step 3: Cross multiply
    64,810.60x = 97,215.90 × 21,034.60
  4. Step 4: Simplify right side
    64,810.60x = 2,044,897,570.14
  5. Step 5: Solve for x
    x = 2,044,897,570.14/64,810.60
  6. Step 6: Final answer
    x = 31,551.90

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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.