Home / 128,819.04-177,753.36-71,457.72

Finding the Fourth Proportional to 128,819.04, 177,753.36 and 71,457.72

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Solution

The fourth proportional to 128,819.04, 177,753.36 and 71,457.72 is: 98,602.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,819.04 : 177,753.36 = 71,457.72 : x
  2. Step 2: Convert to fraction form
    128,819.04/177,753.36 = 71,457.72/x
  3. Step 3: Cross multiply
    128,819.04x = 177,753.36 × 71,457.72
  4. Step 4: Simplify right side
    128,819.04x = 12,701,849,827.94
  5. Step 5: Solve for x
    x = 12,701,849,827.94/128,819.04
  6. Step 6: Final answer
    x = 98,602.27

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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.