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Finding the Fourth Proportional to 128,026.90, 176,673.42 and 71,437.06

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Solution

The fourth proportional to 128,026.90, 176,673.42 and 71,437.06 is: 98,581.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,026.90 : 176,673.42 = 71,437.06 : x
  2. Step 2: Convert to fraction form
    128,026.90/176,673.42 = 71,437.06/x
  3. Step 3: Cross multiply
    128,026.90x = 176,673.42 × 71,437.06
  4. Step 4: Simplify right side
    128,026.90x = 12,621,029,704.95
  5. Step 5: Solve for x
    x = 12,621,029,704.95/128,026.90
  6. Step 6: Final answer
    x = 98,581.08

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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.