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Finding the Fourth Proportional to 387,521.76, 580,968.97 and 121,145.16

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Solution

The fourth proportional to 387,521.76, 580,968.97 and 121,145.16 is: 181,619.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,521.76 : 580,968.97 = 121,145.16 : x
  2. Step 2: Convert to fraction form
    387,521.76/580,968.97 = 121,145.16/x
  3. Step 3: Cross multiply
    387,521.76x = 580,968.97 × 121,145.16
  4. Step 4: Simplify right side
    387,521.76x = 70,381,578,522.82
  5. Step 5: Solve for x
    x = 70,381,578,522.82/387,521.76
  6. Step 6: Final answer
    x = 181,619.68

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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.