Home / 128,458.23-177,228.80-74,699.04

Finding the Fourth Proportional to 128,458.23, 177,228.80 and 74,699.04

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Solution

The fourth proportional to 128,458.23, 177,228.80 and 74,699.04 is: 103,059.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,458.23 : 177,228.80 = 74,699.04 : x
  2. Step 2: Convert to fraction form
    128,458.23/177,228.80 = 74,699.04/x
  3. Step 3: Cross multiply
    128,458.23x = 177,228.80 × 74,699.04
  4. Step 4: Simplify right side
    128,458.23x = 13,238,820,846.86
  5. Step 5: Solve for x
    x = 13,238,820,846.86/128,458.23
  6. Step 6: Final answer
    x = 103,059.34

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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.