Home / 97,931.50-135,186.81-66,143.46

Finding the Fourth Proportional to 97,931.50, 135,186.81 and 66,143.46

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Solution

The fourth proportional to 97,931.50, 135,186.81 and 66,143.46 is: 91,305.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,931.50 : 135,186.81 = 66,143.46 : x
  2. Step 2: Convert to fraction form
    97,931.50/135,186.81 = 66,143.46/x
  3. Step 3: Cross multiply
    97,931.50x = 135,186.81 × 66,143.46
  4. Step 4: Simplify right side
    97,931.50x = 8,941,723,359.76
  5. Step 5: Solve for x
    x = 8,941,723,359.76/97,931.50
  6. Step 6: Final answer
    x = 91,305.90

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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.