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Finding the Fourth Proportional to 111,903.80, 154,426.84 and 61,602.80

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Solution

The fourth proportional to 111,903.80, 154,426.84 and 61,602.80 is: 85,011.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,903.80 : 154,426.84 = 61,602.80 : x
  2. Step 2: Convert to fraction form
    111,903.80/154,426.84 = 61,602.80/x
  3. Step 3: Cross multiply
    111,903.80x = 154,426.84 × 61,602.80
  4. Step 4: Simplify right side
    111,903.80x = 9,513,125,739.15
  5. Step 5: Solve for x
    x = 9,513,125,739.15/111,903.80
  6. Step 6: Final answer
    x = 85,011.64

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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.