Home / 138,385.18-190,970.70-77,975.28

Finding the Fourth Proportional to 138,385.18, 190,970.70 and 77,975.28

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Solution

The fourth proportional to 138,385.18, 190,970.70 and 77,975.28 is: 107,605.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,385.18 : 190,970.70 = 77,975.28 : x
  2. Step 2: Convert to fraction form
    138,385.18/190,970.70 = 77,975.28/x
  3. Step 3: Cross multiply
    138,385.18x = 190,970.70 × 77,975.28
  4. Step 4: Simplify right side
    138,385.18x = 14,890,993,804.30
  5. Step 5: Solve for x
    x = 14,890,993,804.30/138,385.18
  6. Step 6: Final answer
    x = 107,605.41

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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.