Home / 78,403.46-117,012.69-70,836.68

Finding the Fourth Proportional to 78,403.46, 117,012.69 and 70,836.68

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Solution

The fourth proportional to 78,403.46, 117,012.69 and 70,836.68 is: 105,719.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,403.46 : 117,012.69 = 70,836.68 : x
  2. Step 2: Convert to fraction form
    78,403.46/117,012.69 = 70,836.68/x
  3. Step 3: Cross multiply
    78,403.46x = 117,012.69 × 70,836.68
  4. Step 4: Simplify right side
    78,403.46x = 8,288,789,892.41
  5. Step 5: Solve for x
    x = 8,288,789,892.41/78,403.46
  6. Step 6: Final answer
    x = 105,719.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.