Home / 78,708.77-108,618.19-42,898.81

Finding the Fourth Proportional to 78,708.77, 108,618.19 and 42,898.81

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Solution

The fourth proportional to 78,708.77, 108,618.19 and 42,898.81 is: 59,200.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,708.77 : 108,618.19 = 42,898.81 : x
  2. Step 2: Convert to fraction form
    78,708.77/108,618.19 = 42,898.81/x
  3. Step 3: Cross multiply
    78,708.77x = 108,618.19 × 42,898.81
  4. Step 4: Simplify right side
    78,708.77x = 4,659,590,880.86
  5. Step 5: Solve for x
    x = 4,659,590,880.86/78,708.77
  6. Step 6: Final answer
    x = 59,200.40

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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.