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Finding the Fourth Proportional to 421,925.12, 632,807.04 and 126,437.12

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Solution

The fourth proportional to 421,925.12, 632,807.04 and 126,437.12 is: 189,631.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,925.12 : 632,807.04 = 126,437.12 : x
  2. Step 2: Convert to fraction form
    421,925.12/632,807.04 = 126,437.12/x
  3. Step 3: Cross multiply
    421,925.12x = 632,807.04 × 126,437.12
  4. Step 4: Simplify right side
    421,925.12x = 80,010,299,653.32
  5. Step 5: Solve for x
    x = 80,010,299,653.32/421,925.12
  6. Step 6: Final answer
    x = 189,631.51

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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.