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Finding the Fourth Proportional to 100,762.99, 139,052.91 and 55,439.98

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Solution

The fourth proportional to 100,762.99, 139,052.91 and 55,439.98 is: 76,507.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,762.99 : 139,052.91 = 55,439.98 : x
  2. Step 2: Convert to fraction form
    100,762.99/139,052.91 = 55,439.98/x
  3. Step 3: Cross multiply
    100,762.99x = 139,052.91 × 55,439.98
  4. Step 4: Simplify right side
    100,762.99x = 7,709,090,549.34
  5. Step 5: Solve for x
    x = 7,709,090,549.34/100,762.99
  6. Step 6: Final answer
    x = 76,507.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.