Home / 129,053.90-178,088.60-71,697.25

Finding the Fourth Proportional to 129,053.90, 178,088.60 and 71,697.25

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Solution

The fourth proportional to 129,053.90, 178,088.60 and 71,697.25 is: 98,938.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,053.90 : 178,088.60 = 71,697.25 : x
  2. Step 2: Convert to fraction form
    129,053.90/178,088.60 = 71,697.25/x
  3. Step 3: Cross multiply
    129,053.90x = 178,088.60 × 71,697.25
  4. Step 4: Simplify right side
    129,053.90x = 12,768,461,627.42
  5. Step 5: Solve for x
    x = 12,768,461,627.42/129,053.90
  6. Step 6: Final answer
    x = 98,938.98

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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.