Home / 128,861.04-177,827.76-72,272.28

Finding the Fourth Proportional to 128,861.04, 177,827.76 and 72,272.28

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Solution

The fourth proportional to 128,861.04, 177,827.76 and 72,272.28 is: 99,735.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,861.04 : 177,827.76 = 72,272.28 : x
  2. Step 2: Convert to fraction form
    128,861.04/177,827.76 = 72,272.28/x
  3. Step 3: Cross multiply
    128,861.04x = 177,827.76 × 72,272.28
  4. Step 4: Simplify right side
    128,861.04x = 12,852,017,662.49
  5. Step 5: Solve for x
    x = 12,852,017,662.49/128,861.04
  6. Step 6: Final answer
    x = 99,735.48

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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.