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Finding the Fourth Proportional to 130,236.48, 179,726.40 and 72,876.48

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Solution

The fourth proportional to 130,236.48, 179,726.40 and 72,876.48 is: 100,569.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,236.48 : 179,726.40 = 72,876.48 : x
  2. Step 2: Convert to fraction form
    130,236.48/179,726.40 = 72,876.48/x
  3. Step 3: Cross multiply
    130,236.48x = 179,726.40 × 72,876.48
  4. Step 4: Simplify right side
    130,236.48x = 13,097,827,395.07
  5. Step 5: Solve for x
    x = 13,097,827,395.07/130,236.48
  6. Step 6: Final answer
    x = 100,569.57

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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.