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Finding the Fourth Proportional to 211,148.56, 316,743.45 and 61,390

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Solution

The fourth proportional to 211,148.56, 316,743.45 and 61,390 is: 92,090.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,148.56 : 316,743.45 = 61,390 : x
  2. Step 2: Convert to fraction form
    211,148.56/316,743.45 = 61,390/x
  3. Step 3: Cross multiply
    211,148.56x = 316,743.45 × 61,390
  4. Step 4: Simplify right side
    211,148.56x = 19,444,880,395.50
  5. Step 5: Solve for x
    x = 19,444,880,395.50/211,148.56
  6. Step 6: Final answer
    x = 92,090.99

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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.