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Finding the Fourth Proportional to 66,492.66, 91,771.74 and 39,636.90

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Solution

The fourth proportional to 66,492.66, 91,771.74 and 39,636.90 is: 54,706.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,492.66 : 91,771.74 = 39,636.90 : x
  2. Step 2: Convert to fraction form
    66,492.66/91,771.74 = 39,636.90/x
  3. Step 3: Cross multiply
    66,492.66x = 91,771.74 × 39,636.90
  4. Step 4: Simplify right side
    66,492.66x = 3,637,547,281.21
  5. Step 5: Solve for x
    x = 3,637,547,281.21/66,492.66
  6. Step 6: Final answer
    x = 54,706.00

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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.