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Finding the Fourth Proportional to 425,840.10, 638,574.71 and 122,167.25

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Solution

The fourth proportional to 425,840.10, 638,574.71 and 122,167.25 is: 183,197.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,840.10 : 638,574.71 = 122,167.25 : x
  2. Step 2: Convert to fraction form
    425,840.10/638,574.71 = 122,167.25/x
  3. Step 3: Cross multiply
    425,840.10x = 638,574.71 × 122,167.25
  4. Step 4: Simplify right side
    425,840.10x = 78,012,914,831.19
  5. Step 5: Solve for x
    x = 78,012,914,831.19/425,840.10
  6. Step 6: Final answer
    x = 183,197.67

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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.