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Finding the Fourth Proportional to 56,068.32, 77,374.86 and 30,918.72

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Solution

The fourth proportional to 56,068.32, 77,374.86 and 30,918.72 is: 42,668.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,068.32 : 77,374.86 = 30,918.72 : x
  2. Step 2: Convert to fraction form
    56,068.32/77,374.86 = 30,918.72/x
  3. Step 3: Cross multiply
    56,068.32x = 77,374.86 × 30,918.72
  4. Step 4: Simplify right side
    56,068.32x = 2,392,331,631.38
  5. Step 5: Solve for x
    x = 2,392,331,631.38/56,068.32
  6. Step 6: Final answer
    x = 42,668.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.