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Finding the Fourth Proportional to 128,810.44, 177,741.30 and 71,448.94

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Solution

The fourth proportional to 128,810.44, 177,741.30 and 71,448.94 is: 98,590.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,810.44 : 177,741.30 = 71,448.94 : x
  2. Step 2: Convert to fraction form
    128,810.44/177,741.30 = 71,448.94/x
  3. Step 3: Cross multiply
    128,810.44x = 177,741.30 × 71,448.94
  4. Step 4: Simplify right side
    128,810.44x = 12,699,427,479.22
  5. Step 5: Solve for x
    x = 12,699,427,479.22/128,810.44
  6. Step 6: Final answer
    x = 98,590.05

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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.