Home / 66,428.90-99,643.35-40,120.10

Finding the Fourth Proportional to 66,428.90, 99,643.35 and 40,120.10

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Solution

The fourth proportional to 66,428.90, 99,643.35 and 40,120.10 is: 60,180.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,428.90 : 99,643.35 = 40,120.10 : x
  2. Step 2: Convert to fraction form
    66,428.90/99,643.35 = 40,120.10/x
  3. Step 3: Cross multiply
    66,428.90x = 99,643.35 × 40,120.10
  4. Step 4: Simplify right side
    66,428.90x = 3,997,701,166.34
  5. Step 5: Solve for x
    x = 3,997,701,166.34/66,428.90
  6. Step 6: Final answer
    x = 60,180.15

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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.