Home / 105,515.02-145,610.66-57,768.36

Finding the Fourth Proportional to 105,515.02, 145,610.66 and 57,768.36

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Solution

The fourth proportional to 105,515.02, 145,610.66 and 57,768.36 is: 79,720.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,515.02 : 145,610.66 = 57,768.36 : x
  2. Step 2: Convert to fraction form
    105,515.02/145,610.66 = 57,768.36/x
  3. Step 3: Cross multiply
    105,515.02x = 145,610.66 × 57,768.36
  4. Step 4: Simplify right side
    105,515.02x = 8,411,688,625.10
  5. Step 5: Solve for x
    x = 8,411,688,625.10/105,515.02
  6. Step 6: Final answer
    x = 79,720.30

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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.