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Finding the Fourth Proportional to 445,458.16, 668,122.44 and 129,830.32

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Solution

The fourth proportional to 445,458.16, 668,122.44 and 129,830.32 is: 194,726.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,458.16 : 668,122.44 = 129,830.32 : x
  2. Step 2: Convert to fraction form
    445,458.16/668,122.44 = 129,830.32/x
  3. Step 3: Cross multiply
    445,458.16x = 668,122.44 × 129,830.32
  4. Step 4: Simplify right side
    445,458.16x = 86,742,550,184.38
  5. Step 5: Solve for x
    x = 86,742,550,184.38/445,458.16
  6. Step 6: Final answer
    x = 194,726.59

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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.