Home / 97,931.76-135,187.16-66,143.70

Finding the Fourth Proportional to 97,931.76, 135,187.16 and 66,143.70

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Solution

The fourth proportional to 97,931.76, 135,187.16 and 66,143.70 is: 91,306.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,931.76 : 135,187.16 = 66,143.70 : x
  2. Step 2: Convert to fraction form
    97,931.76/135,187.16 = 66,143.70/x
  3. Step 3: Cross multiply
    97,931.76x = 135,187.16 × 66,143.70
  4. Step 4: Simplify right side
    97,931.76x = 8,941,778,954.89
  5. Step 5: Solve for x
    x = 8,941,778,954.89/97,931.76
  6. Step 6: Final answer
    x = 91,306.22

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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.