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Finding the Fourth Proportional to 66,547.41, 91,726.02 and 47,172.81

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Solution

The fourth proportional to 66,547.41, 91,726.02 and 47,172.81 is: 65,020.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,547.41 : 91,726.02 = 47,172.81 : x
  2. Step 2: Convert to fraction form
    66,547.41/91,726.02 = 47,172.81/x
  3. Step 3: Cross multiply
    66,547.41x = 91,726.02 × 47,172.81
  4. Step 4: Simplify right side
    66,547.41x = 4,326,974,113.52
  5. Step 5: Solve for x
    x = 4,326,974,113.52/66,547.41
  6. Step 6: Final answer
    x = 65,020.92

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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.