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Finding the Fourth Proportional to 66,012.68, 99,049.80 and 39,358.10

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Solution

The fourth proportional to 66,012.68, 99,049.80 and 39,358.10 is: 59,055.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,012.68 : 99,049.80 = 39,358.10 : x
  2. Step 2: Convert to fraction form
    66,012.68/99,049.80 = 39,358.10/x
  3. Step 3: Cross multiply
    66,012.68x = 99,049.80 × 39,358.10
  4. Step 4: Simplify right side
    66,012.68x = 3,898,411,933.38
  5. Step 5: Solve for x
    x = 3,898,411,933.38/66,012.68
  6. Step 6: Final answer
    x = 59,055.50

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1.5x scale

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.