Home / 135,516.95-187,008.35-78,158.67

Finding the Fourth Proportional to 135,516.95, 187,008.35 and 78,158.67

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Solution

The fourth proportional to 135,516.95, 187,008.35 and 78,158.67 is: 107,856.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,516.95 : 187,008.35 = 78,158.67 : x
  2. Step 2: Convert to fraction form
    135,516.95/187,008.35 = 78,158.67/x
  3. Step 3: Cross multiply
    135,516.95x = 187,008.35 × 78,158.67
  4. Step 4: Simplify right side
    135,516.95x = 14,616,323,874.74
  5. Step 5: Solve for x
    x = 14,616,323,874.74/135,516.95
  6. Step 6: Final answer
    x = 107,856.06

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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.