Home / 129,070.02-178,110.36-71,712.96

Finding the Fourth Proportional to 129,070.02, 178,110.36 and 71,712.96

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Solution

The fourth proportional to 129,070.02, 178,110.36 and 71,712.96 is: 98,960.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,070.02 : 178,110.36 = 71,712.96 : x
  2. Step 2: Convert to fraction form
    129,070.02/178,110.36 = 71,712.96/x
  3. Step 3: Cross multiply
    129,070.02x = 178,110.36 × 71,712.96
  4. Step 4: Simplify right side
    129,070.02x = 12,772,821,122.27
  5. Step 5: Solve for x
    x = 12,772,821,122.27/129,070.02
  6. Step 6: Final answer
    x = 98,960.40

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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.