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Finding the Fourth Proportional to 40,700.79, 61,068.75 and 21,977.10

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Solution

The fourth proportional to 40,700.79, 61,068.75 and 21,977.10 is: 32,975.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,700.79 : 61,068.75 = 21,977.10 : x
  2. Step 2: Convert to fraction form
    40,700.79/61,068.75 = 21,977.10/x
  3. Step 3: Cross multiply
    40,700.79x = 61,068.75 × 21,977.10
  4. Step 4: Simplify right side
    40,700.79x = 1,342,114,025.63
  5. Step 5: Solve for x
    x = 1,342,114,025.63/40,700.79
  6. Step 6: Final answer
    x = 32,975.13

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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.