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Finding the Fourth Proportional to 75,160.40, 112,870.20 and 53,128.40

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Solution

The fourth proportional to 75,160.40, 112,870.20 and 53,128.40 is: 79,784.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,160.40 : 112,870.20 = 53,128.40 : x
  2. Step 2: Convert to fraction form
    75,160.40/112,870.20 = 53,128.40/x
  3. Step 3: Cross multiply
    75,160.40x = 112,870.20 × 53,128.40
  4. Step 4: Simplify right side
    75,160.40x = 5,996,613,133.68
  5. Step 5: Solve for x
    x = 5,996,613,133.68/75,160.40
  6. Step 6: Final answer
    x = 79,784.21

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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.