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Finding the Fourth Proportional to 210,888.77, 316,379.93 and 61,135.16

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Solution

The fourth proportional to 210,888.77, 316,379.93 and 61,135.16 is: 91,716.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,888.77 : 316,379.93 = 61,135.16 : x
  2. Step 2: Convert to fraction form
    210,888.77/316,379.93 = 61,135.16/x
  3. Step 3: Cross multiply
    210,888.77x = 316,379.93 × 61,135.16
  4. Step 4: Simplify right side
    210,888.77x = 19,341,935,753.76
  5. Step 5: Solve for x
    x = 19,341,935,753.76/210,888.77
  6. Step 6: Final answer
    x = 91,716.29

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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.