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Finding the Fourth Proportional to 105,099.86, 145,040.87 and 57,356.28

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Solution

The fourth proportional to 105,099.86, 145,040.87 and 57,356.28 is: 79,153.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,099.86 : 145,040.87 = 57,356.28 : x
  2. Step 2: Convert to fraction form
    105,099.86/145,040.87 = 57,356.28/x
  3. Step 3: Cross multiply
    105,099.86x = 145,040.87 × 57,356.28
  4. Step 4: Simplify right side
    105,099.86x = 8,319,004,751.16
  5. Step 5: Solve for x
    x = 8,319,004,751.16/105,099.86
  6. Step 6: Final answer
    x = 79,153.34

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1.5x scale

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.