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Finding the Fourth Proportional to 316,416.33, 474,623.78 and 79,777.53

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Solution

The fourth proportional to 316,416.33, 474,623.78 and 79,777.53 is: 119,666.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,416.33 : 474,623.78 = 79,777.53 : x
  2. Step 2: Convert to fraction form
    316,416.33/474,623.78 = 79,777.53/x
  3. Step 3: Cross multiply
    316,416.33x = 474,623.78 × 79,777.53
  4. Step 4: Simplify right side
    316,416.33x = 37,864,312,448.78
  5. Step 5: Solve for x
    x = 37,864,312,448.78/316,416.33
  6. Step 6: Final answer
    x = 119,666.11

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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.