Home / 135,581.14-187,038.69-85,307.86

Finding the Fourth Proportional to 135,581.14, 187,038.69 and 85,307.86

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Solution

The fourth proportional to 135,581.14, 187,038.69 and 85,307.86 is: 117,685.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,581.14 : 187,038.69 = 85,307.86 : x
  2. Step 2: Convert to fraction form
    135,581.14/187,038.69 = 85,307.86/x
  3. Step 3: Cross multiply
    135,581.14x = 187,038.69 × 85,307.86
  4. Step 4: Simplify right side
    135,581.14x = 15,955,870,381.10
  5. Step 5: Solve for x
    x = 15,955,870,381.10/135,581.14
  6. Step 6: Final answer
    x = 117,685.03

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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.