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Finding the Fourth Proportional to 212,820.80, 319,173.60 and 63,060.80

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Solution

The fourth proportional to 212,820.80, 319,173.60 and 63,060.80 is: 94,574.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,820.80 : 319,173.60 = 63,060.80 : x
  2. Step 2: Convert to fraction form
    212,820.80/319,173.60 = 63,060.80/x
  3. Step 3: Cross multiply
    212,820.80x = 319,173.60 × 63,060.80
  4. Step 4: Simplify right side
    212,820.80x = 20,127,342,554.88
  5. Step 5: Solve for x
    x = 20,127,342,554.88/212,820.80
  6. Step 6: Final answer
    x = 94,574.13

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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.