Home / 128,737.32-177,664.79-72,152.34

Finding the Fourth Proportional to 128,737.32, 177,664.79 and 72,152.34

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Solution

The fourth proportional to 128,737.32, 177,664.79 and 72,152.34 is: 99,574.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,737.32 : 177,664.79 = 72,152.34 : x
  2. Step 2: Convert to fraction form
    128,737.32/177,664.79 = 72,152.34/x
  3. Step 3: Cross multiply
    128,737.32x = 177,664.79 × 72,152.34
  4. Step 4: Simplify right side
    128,737.32x = 12,818,930,334.11
  5. Step 5: Solve for x
    x = 12,818,930,334.11/128,737.32
  6. Step 6: Final answer
    x = 99,574.31

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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.