Home / 78,920.16-108,688.64-78,674.24

Finding the Fourth Proportional to 78,920.16, 108,688.64 and 78,674.24

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Solution

The fourth proportional to 78,920.16, 108,688.64 and 78,674.24 is: 108,349.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,920.16 : 108,688.64 = 78,674.24 : x
  2. Step 2: Convert to fraction form
    78,920.16/108,688.64 = 78,674.24/x
  3. Step 3: Cross multiply
    78,920.16x = 108,688.64 × 78,674.24
  4. Step 4: Simplify right side
    78,920.16x = 8,550,996,148.63
  5. Step 5: Solve for x
    x = 8,550,996,148.63/78,920.16
  6. Step 6: Final answer
    x = 108,349.96

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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.