Home / 78,423.28-116,981.69-70,855.58

Finding the Fourth Proportional to 78,423.28, 116,981.69 and 70,855.58

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Solution

The fourth proportional to 78,423.28, 116,981.69 and 70,855.58 is: 105,693.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,423.28 : 116,981.69 = 70,855.58 : x
  2. Step 2: Convert to fraction form
    78,423.28/116,981.69 = 70,855.58/x
  3. Step 3: Cross multiply
    78,423.28x = 116,981.69 × 70,855.58
  4. Step 4: Simplify right side
    78,423.28x = 8,288,805,494.33
  5. Step 5: Solve for x
    x = 8,288,805,494.33/78,423.28
  6. Step 6: Final answer
    x = 105,693.18

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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.