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Finding the Fourth Proportional to 424,073.64, 636,173.46 and 139,711.71

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Solution

The fourth proportional to 424,073.64, 636,173.46 and 139,711.71 is: 209,588.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,073.64 : 636,173.46 = 139,711.71 : x
  2. Step 2: Convert to fraction form
    424,073.64/636,173.46 = 139,711.71/x
  3. Step 3: Cross multiply
    424,073.64x = 636,173.46 × 139,711.71
  4. Step 4: Simplify right side
    424,073.64x = 88,880,881,953.22
  5. Step 5: Solve for x
    x = 88,880,881,953.22/424,073.64
  6. Step 6: Final answer
    x = 209,588.32

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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.