Home / 102,968.79-142,090.25-57,646.40

Finding the Fourth Proportional to 102,968.79, 142,090.25 and 57,646.40

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Solution

The fourth proportional to 102,968.79, 142,090.25 and 57,646.40 is: 79,548.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,968.79 : 142,090.25 = 57,646.40 : x
  2. Step 2: Convert to fraction form
    102,968.79/142,090.25 = 57,646.40/x
  3. Step 3: Cross multiply
    102,968.79x = 142,090.25 × 57,646.40
  4. Step 4: Simplify right side
    102,968.79x = 8,190,990,388.92
  5. Step 5: Solve for x
    x = 8,190,990,388.92/102,968.79
  6. Step 6: Final answer
    x = 79,548.28

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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.