Home / 128,255.16-176,991.75-71,666.58

Finding the Fourth Proportional to 128,255.16, 176,991.75 and 71,666.58

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Solution

The fourth proportional to 128,255.16, 176,991.75 and 71,666.58 is: 98,899.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,255.16 : 176,991.75 = 71,666.58 : x
  2. Step 2: Convert to fraction form
    128,255.16/176,991.75 = 71,666.58/x
  3. Step 3: Cross multiply
    128,255.16x = 176,991.75 × 71,666.58
  4. Step 4: Simplify right side
    128,255.16x = 12,684,393,410.72
  5. Step 5: Solve for x
    x = 12,684,393,410.72/128,255.16
  6. Step 6: Final answer
    x = 98,899.67

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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.