Home / 98,128.32-135,457.92-74,261.76

Finding the Fourth Proportional to 98,128.32, 135,457.92 and 74,261.76

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Solution

The fourth proportional to 98,128.32, 135,457.92 and 74,261.76 is: 102,512.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,128.32 : 135,457.92 = 74,261.76 : x
  2. Step 2: Convert to fraction form
    98,128.32/135,457.92 = 74,261.76/x
  3. Step 3: Cross multiply
    98,128.32x = 135,457.92 × 74,261.76
  4. Step 4: Simplify right side
    98,128.32x = 10,059,343,545.14
  5. Step 5: Solve for x
    x = 10,059,343,545.14/98,128.32
  6. Step 6: Final answer
    x = 102,512.13

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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.