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Finding the Fourth Proportional to 68,434.32, 93,753.45 and 65,875.79

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Solution

The fourth proportional to 68,434.32, 93,753.45 and 65,875.79 is: 90,248.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,434.32 : 93,753.45 = 65,875.79 : x
  2. Step 2: Convert to fraction form
    68,434.32/93,753.45 = 65,875.79/x
  3. Step 3: Cross multiply
    68,434.32x = 93,753.45 × 65,875.79
  4. Step 4: Simplify right side
    68,434.32x = 6,176,082,254.60
  5. Step 5: Solve for x
    x = 6,176,082,254.60/68,434.32
  6. Step 6: Final answer
    x = 90,248.32

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.