Home / 211,628.40-317,445.48-78,457.20

Finding the Fourth Proportional to 211,628.40, 317,445.48 and 78,457.20

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Solution

The fourth proportional to 211,628.40, 317,445.48 and 78,457.20 is: 117,686.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,628.40 : 317,445.48 = 78,457.20 : x
  2. Step 2: Convert to fraction form
    211,628.40/317,445.48 = 78,457.20/x
  3. Step 3: Cross multiply
    211,628.40x = 317,445.48 × 78,457.20
  4. Step 4: Simplify right side
    211,628.40x = 24,905,883,513.46
  5. Step 5: Solve for x
    x = 24,905,883,513.46/211,628.40
  6. Step 6: Final answer
    x = 117,686.87

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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.