Home / 212,479.12-318,742.02-70,272.58

Finding the Fourth Proportional to 212,479.12, 318,742.02 and 70,272.58

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Solution

The fourth proportional to 212,479.12, 318,742.02 and 70,272.58 is: 105,416.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,479.12 : 318,742.02 = 70,272.58 : x
  2. Step 2: Convert to fraction form
    212,479.12/318,742.02 = 70,272.58/x
  3. Step 3: Cross multiply
    212,479.12x = 318,742.02 × 70,272.58
  4. Step 4: Simplify right side
    212,479.12x = 22,398,824,099.81
  5. Step 5: Solve for x
    x = 22,398,824,099.81/212,479.12
  6. Step 6: Final answer
    x = 105,416.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.