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Finding the Fourth Proportional to 291,709, 437,637.30 and 81,346.96

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Solution

The fourth proportional to 291,709, 437,637.30 and 81,346.96 is: 122,041.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,709 : 437,637.30 = 81,346.96 : x
  2. Step 2: Convert to fraction form
    291,709/437,637.30 = 81,346.96/x
  3. Step 3: Cross multiply
    291,709x = 437,637.30 × 81,346.96
  4. Step 4: Simplify right side
    291,709x = 35,600,463,937.61
  5. Step 5: Solve for x
    x = 35,600,463,937.61/291,709
  6. Step 6: Final answer
    x = 122,041.02

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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.