Home / 42,128.42-63,192.62-28,940.81

Finding the Fourth Proportional to 42,128.42, 63,192.62 and 28,940.81

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Solution

The fourth proportional to 42,128.42, 63,192.62 and 28,940.81 is: 43,411.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,128.42 : 63,192.62 = 28,940.81 : x
  2. Step 2: Convert to fraction form
    42,128.42/63,192.62 = 28,940.81/x
  3. Step 3: Cross multiply
    42,128.42x = 63,192.62 × 28,940.81
  4. Step 4: Simplify right side
    42,128.42x = 1,828,845,365.21
  5. Step 5: Solve for x
    x = 1,828,845,365.21/42,128.42
  6. Step 6: Final answer
    x = 43,411.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.