Home / 105,166.92-145,128.33-57,420.60

Finding the Fourth Proportional to 105,166.92, 145,128.33 and 57,420.60

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Solution

The fourth proportional to 105,166.92, 145,128.33 and 57,420.60 is: 79,239.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,166.92 : 145,128.33 = 57,420.60 : x
  2. Step 2: Convert to fraction form
    105,166.92/145,128.33 = 57,420.60/x
  3. Step 3: Cross multiply
    105,166.92x = 145,128.33 × 57,420.60
  4. Step 4: Simplify right side
    105,166.92x = 8,333,355,785.60
  5. Step 5: Solve for x
    x = 8,333,355,785.60/105,166.92
  6. Step 6: Final answer
    x = 79,239.33

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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.