Home / 130,348.09-179,838.54-72,978.96

Finding the Fourth Proportional to 130,348.09, 179,838.54 and 72,978.96

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Solution

The fourth proportional to 130,348.09, 179,838.54 and 72,978.96 is: 100,687.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,348.09 : 179,838.54 = 72,978.96 : x
  2. Step 2: Convert to fraction form
    130,348.09/179,838.54 = 72,978.96/x
  3. Step 3: Cross multiply
    130,348.09x = 179,838.54 × 72,978.96
  4. Step 4: Simplify right side
    130,348.09x = 13,124,429,617.12
  5. Step 5: Solve for x
    x = 13,124,429,617.12/130,348.09
  6. Step 6: Final answer
    x = 100,687.55

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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.