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Finding the Fourth Proportional to 59,160, 81,640.80 and 40,330.08

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Solution

The fourth proportional to 59,160, 81,640.80 and 40,330.08 is: 55,655.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,160 : 81,640.80 = 40,330.08 : x
  2. Step 2: Convert to fraction form
    59,160/81,640.80 = 40,330.08/x
  3. Step 3: Cross multiply
    59,160x = 81,640.80 × 40,330.08
  4. Step 4: Simplify right side
    59,160x = 3,292,579,995.26
  5. Step 5: Solve for x
    x = 3,292,579,995.26/59,160
  6. Step 6: Final answer
    x = 55,655.51

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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.