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Finding the Fourth Proportional to 68,437.90, 102,666.57 and 21,056.92

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Solution

The fourth proportional to 68,437.90, 102,666.57 and 21,056.92 is: 31,588.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,437.90 : 102,666.57 = 21,056.92 : x
  2. Step 2: Convert to fraction form
    68,437.90/102,666.57 = 21,056.92/x
  3. Step 3: Cross multiply
    68,437.90x = 102,666.57 × 21,056.92
  4. Step 4: Simplify right side
    68,437.90x = 2,161,841,751.16
  5. Step 5: Solve for x
    x = 2,161,841,751.16/68,437.90
  6. Step 6: Final answer
    x = 31,588.37

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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.