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Finding the Fourth Proportional to 66,457.51, 99,691.67 and 19,710.25

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Solution

The fourth proportional to 66,457.51, 99,691.67 and 19,710.25 is: 29,566.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,457.51 : 99,691.67 = 19,710.25 : x
  2. Step 2: Convert to fraction form
    66,457.51/99,691.67 = 19,710.25/x
  3. Step 3: Cross multiply
    66,457.51x = 99,691.67 × 19,710.25
  4. Step 4: Simplify right side
    66,457.51x = 1,964,947,640.07
  5. Step 5: Solve for x
    x = 1,964,947,640.07/66,457.51
  6. Step 6: Final answer
    x = 29,566.98

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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.