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Finding the Fourth Proportional to 91,130.40, 136,695.60 and 83,913.30

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Solution

The fourth proportional to 91,130.40, 136,695.60 and 83,913.30 is: 125,869.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,130.40 : 136,695.60 = 83,913.30 : x
  2. Step 2: Convert to fraction form
    91,130.40/136,695.60 = 83,913.30/x
  3. Step 3: Cross multiply
    91,130.40x = 136,695.60 × 83,913.30
  4. Step 4: Simplify right side
    91,130.40x = 11,470,578,891.48
  5. Step 5: Solve for x
    x = 11,470,578,891.48/91,130.40
  6. Step 6: Final answer
    x = 125,869.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.