Home / 66,428-91,663.32-39,566.84

Finding the Fourth Proportional to 66,428, 91,663.32 and 39,566.84

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Solution

The fourth proportional to 66,428, 91,663.32 and 39,566.84 is: 54,597.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,428 : 91,663.32 = 39,566.84 : x
  2. Step 2: Convert to fraction form
    66,428/91,663.32 = 39,566.84/x
  3. Step 3: Cross multiply
    66,428x = 91,663.32 × 39,566.84
  4. Step 4: Simplify right side
    66,428x = 3,626,827,916.31
  5. Step 5: Solve for x
    x = 3,626,827,916.31/66,428
  6. Step 6: Final answer
    x = 54,597.88

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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.