Home / 100,318.67-138,457.35-76,199.47

Finding the Fourth Proportional to 100,318.67, 138,457.35 and 76,199.47

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Solution

The fourth proportional to 100,318.67, 138,457.35 and 76,199.47 is: 105,168.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,318.67 : 138,457.35 = 76,199.47 : x
  2. Step 2: Convert to fraction form
    100,318.67/138,457.35 = 76,199.47/x
  3. Step 3: Cross multiply
    100,318.67x = 138,457.35 × 76,199.47
  4. Step 4: Simplify right side
    100,318.67x = 10,550,376,341.46
  5. Step 5: Solve for x
    x = 10,550,376,341.46/100,318.67
  6. Step 6: Final answer
    x = 105,168.62

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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.