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Finding the Fourth Proportional to 128,595.61, 177,457.92 and 71,232.62

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Solution

The fourth proportional to 128,595.61, 177,457.92 and 71,232.62 is: 98,298.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,595.61 : 177,457.92 = 71,232.62 : x
  2. Step 2: Convert to fraction form
    128,595.61/177,457.92 = 71,232.62/x
  3. Step 3: Cross multiply
    128,595.61x = 177,457.92 × 71,232.62
  4. Step 4: Simplify right side
    128,595.61x = 12,640,792,581.35
  5. Step 5: Solve for x
    x = 12,640,792,581.35/128,595.61
  6. Step 6: Final answer
    x = 98,298.79

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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.