Home / 105,128.88-145,080.60-57,386.64

Finding the Fourth Proportional to 105,128.88, 145,080.60 and 57,386.64

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Solution

The fourth proportional to 105,128.88, 145,080.60 and 57,386.64 is: 79,195.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,128.88 : 145,080.60 = 57,386.64 : x
  2. Step 2: Convert to fraction form
    105,128.88/145,080.60 = 57,386.64/x
  3. Step 3: Cross multiply
    105,128.88x = 145,080.60 × 57,386.64
  4. Step 4: Simplify right side
    105,128.88x = 8,325,688,163.18
  5. Step 5: Solve for x
    x = 8,325,688,163.18/105,128.88
  6. Step 6: Final answer
    x = 79,195.06

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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.