Home / 66,428.47-91,619.40-42,557.41

Finding the Fourth Proportional to 66,428.47, 91,619.40 and 42,557.41

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Solution

The fourth proportional to 66,428.47, 91,619.40 and 42,557.41 is: 58,695.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,428.47 : 91,619.40 = 42,557.41 : x
  2. Step 2: Convert to fraction form
    66,428.47/91,619.40 = 42,557.41/x
  3. Step 3: Cross multiply
    66,428.47x = 91,619.40 × 42,557.41
  4. Step 4: Simplify right side
    66,428.47x = 3,899,084,369.75
  5. Step 5: Solve for x
    x = 3,899,084,369.75/66,428.47
  6. Step 6: Final answer
    x = 58,695.98

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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.