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Finding the Fourth Proportional to 141,978.76, 195,931.93 and 77,448.28

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Solution

The fourth proportional to 141,978.76, 195,931.93 and 77,448.28 is: 106,879.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,978.76 : 195,931.93 = 77,448.28 : x
  2. Step 2: Convert to fraction form
    141,978.76/195,931.93 = 77,448.28/x
  3. Step 3: Cross multiply
    141,978.76x = 195,931.93 × 77,448.28
  4. Step 4: Simplify right side
    141,978.76x = 15,174,590,975.58
  5. Step 5: Solve for x
    x = 15,174,590,975.58/141,978.76
  6. Step 6: Final answer
    x = 106,879.30

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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.