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Finding the Fourth Proportional to 421,530.08, 632,328.12 and 122,015.16

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Solution

The fourth proportional to 421,530.08, 632,328.12 and 122,015.16 is: 183,032.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,530.08 : 632,328.12 = 122,015.16 : x
  2. Step 2: Convert to fraction form
    421,530.08/632,328.12 = 122,015.16/x
  3. Step 3: Cross multiply
    421,530.08x = 632,328.12 × 122,015.16
  4. Step 4: Simplify right side
    421,530.08x = 77,153,616,734.30
  5. Step 5: Solve for x
    x = 77,153,616,734.30/421,530.08
  6. Step 6: Final answer
    x = 183,032.29

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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.