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Finding the Fourth Proportional to 66,498.78, 91,802.16 and 51,357.45

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Solution

The fourth proportional to 66,498.78, 91,802.16 and 51,357.45 is: 70,899.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,498.78 : 91,802.16 = 51,357.45 : x
  2. Step 2: Convert to fraction form
    66,498.78/91,802.16 = 51,357.45/x
  3. Step 3: Cross multiply
    66,498.78x = 91,802.16 × 51,357.45
  4. Step 4: Simplify right side
    66,498.78x = 4,714,724,669.96
  5. Step 5: Solve for x
    x = 4,714,724,669.96/66,498.78
  6. Step 6: Final answer
    x = 70,899.42

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1.5x scale

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.