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Finding the Fourth Proportional to 211,095.12, 316,644.28 and 61,345.56

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Solution

The fourth proportional to 211,095.12, 316,644.28 and 61,345.56 is: 92,018.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,095.12 : 316,644.28 = 61,345.56 : x
  2. Step 2: Convert to fraction form
    211,095.12/316,644.28 = 61,345.56/x
  3. Step 3: Cross multiply
    211,095.12x = 316,644.28 × 61,345.56
  4. Step 4: Simplify right side
    211,095.12x = 19,424,720,677.40
  5. Step 5: Solve for x
    x = 19,424,720,677.40/211,095.12
  6. Step 6: Final answer
    x = 92,018.80

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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.