Home / 212,985.48-319,384.94-79,772.28

Finding the Fourth Proportional to 212,985.48, 319,384.94 and 79,772.28

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Solution

The fourth proportional to 212,985.48, 319,384.94 and 79,772.28 is: 119,623.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,985.48 : 319,384.94 = 79,772.28 : x
  2. Step 2: Convert to fraction form
    212,985.48/319,384.94 = 79,772.28/x
  3. Step 3: Cross multiply
    212,985.48x = 319,384.94 × 79,772.28
  4. Step 4: Simplify right side
    212,985.48x = 25,478,064,861.46
  5. Step 5: Solve for x
    x = 25,478,064,861.46/212,985.48
  6. Step 6: Final answer
    x = 119,623.48

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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.