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Finding the Fourth Proportional to 128,510.37, 177,362.93 and 74,051.94

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Solution

The fourth proportional to 128,510.37, 177,362.93 and 74,051.94 is: 102,202.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,510.37 : 177,362.93 = 74,051.94 : x
  2. Step 2: Convert to fraction form
    128,510.37/177,362.93 = 74,051.94/x
  3. Step 3: Cross multiply
    128,510.37x = 177,362.93 × 74,051.94
  4. Step 4: Simplify right side
    128,510.37x = 13,134,069,050.58
  5. Step 5: Solve for x
    x = 13,134,069,050.58/128,510.37
  6. Step 6: Final answer
    x = 102,202.41

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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.