Home / 112,343.16-154,769.85-78,289.74

Finding the Fourth Proportional to 112,343.16, 154,769.85 and 78,289.74

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Solution

The fourth proportional to 112,343.16, 154,769.85 and 78,289.74 is: 107,856.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,343.16 : 154,769.85 = 78,289.74 : x
  2. Step 2: Convert to fraction form
    112,343.16/154,769.85 = 78,289.74/x
  3. Step 3: Cross multiply
    112,343.16x = 154,769.85 × 78,289.74
  4. Step 4: Simplify right side
    112,343.16x = 12,116,891,316.34
  5. Step 5: Solve for x
    x = 12,116,891,316.34/112,343.16
  6. Step 6: Final answer
    x = 107,856.07

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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.