Home / 129,455.48-178,703.62-87,038.60

Finding the Fourth Proportional to 129,455.48, 178,703.62 and 87,038.60

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Solution

The fourth proportional to 129,455.48, 178,703.62 and 87,038.60 is: 120,150.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,455.48 : 178,703.62 = 87,038.60 : x
  2. Step 2: Convert to fraction form
    129,455.48/178,703.62 = 87,038.60/x
  3. Step 3: Cross multiply
    129,455.48x = 178,703.62 × 87,038.60
  4. Step 4: Simplify right side
    129,455.48x = 15,554,112,899.73
  5. Step 5: Solve for x
    x = 15,554,112,899.73/129,455.48
  6. Step 6: Final answer
    x = 120,150.29

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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.