Home / 97,931.39-135,143.40-57,103.13

Finding the Fourth Proportional to 97,931.39, 135,143.40 and 57,103.13

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Solution

The fourth proportional to 97,931.39, 135,143.40 and 57,103.13 is: 78,801.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,931.39 : 135,143.40 = 57,103.13 : x
  2. Step 2: Convert to fraction form
    97,931.39/135,143.40 = 57,103.13/x
  3. Step 3: Cross multiply
    97,931.39x = 135,143.40 × 57,103.13
  4. Step 4: Simplify right side
    97,931.39x = 7,717,111,690.84
  5. Step 5: Solve for x
    x = 7,717,111,690.84/97,931.39
  6. Step 6: Final answer
    x = 78,801.21

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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.