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Finding the Fourth Proportional to 424,019.02, 636,091.57 and 139,657.08

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Solution

The fourth proportional to 424,019.02, 636,091.57 and 139,657.08 is: 209,506.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,019.02 : 636,091.57 = 139,657.08 : x
  2. Step 2: Convert to fraction form
    424,019.02/636,091.57 = 139,657.08/x
  3. Step 3: Cross multiply
    424,019.02x = 636,091.57 × 139,657.08
  4. Step 4: Simplify right side
    424,019.02x = 88,834,689,475.14
  5. Step 5: Solve for x
    x = 88,834,689,475.14/424,019.02
  6. Step 6: Final answer
    x = 209,506.38

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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.