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Finding the Fourth Proportional to 66,484.65, 91,782.68 and 51,343.32

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Solution

The fourth proportional to 66,484.65, 91,782.68 and 51,343.32 is: 70,879.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,484.65 : 91,782.68 = 51,343.32 : x
  2. Step 2: Convert to fraction form
    66,484.65/91,782.68 = 51,343.32/x
  3. Step 3: Cross multiply
    66,484.65x = 91,782.68 × 51,343.32
  4. Step 4: Simplify right side
    66,484.65x = 4,712,427,509.70
  5. Step 5: Solve for x
    x = 4,712,427,509.70/66,484.65
  6. Step 6: Final answer
    x = 70,879.93

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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.