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Finding the Fourth Proportional to 128,192.51, 176,871.44 and 71,602.67

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Solution

The fourth proportional to 128,192.51, 176,871.44 and 71,602.67 is: 98,792.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,192.51 : 176,871.44 = 71,602.67 : x
  2. Step 2: Convert to fraction form
    128,192.51/176,871.44 = 71,602.67/x
  3. Step 3: Cross multiply
    128,192.51x = 176,871.44 × 71,602.67
  4. Step 4: Simplify right side
    128,192.51x = 12,664,466,108.37
  5. Step 5: Solve for x
    x = 12,664,466,108.37/128,192.51
  6. Step 6: Final answer
    x = 98,792.56

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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.