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Finding the Fourth Proportional to 97,911.81, 135,130.55 and 55,484.01

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Solution

The fourth proportional to 97,911.81, 135,130.55 and 55,484.01 is: 76,574.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,911.81 : 135,130.55 = 55,484.01 : x
  2. Step 2: Convert to fraction form
    97,911.81/135,130.55 = 55,484.01/x
  3. Step 3: Cross multiply
    97,911.81x = 135,130.55 × 55,484.01
  4. Step 4: Simplify right side
    97,911.81x = 7,497,584,510.09
  5. Step 5: Solve for x
    x = 7,497,584,510.09/97,911.81
  6. Step 6: Final answer
    x = 76,574.87

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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.