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Finding the Fourth Proportional to 98,028, 135,279.72 and 53,316

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Solution

The fourth proportional to 98,028, 135,279.72 and 53,316 is: 73,576.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,028 : 135,279.72 = 53,316 : x
  2. Step 2: Convert to fraction form
    98,028/135,279.72 = 53,316/x
  3. Step 3: Cross multiply
    98,028x = 135,279.72 × 53,316
  4. Step 4: Simplify right side
    98,028x = 7,212,573,551.52
  5. Step 5: Solve for x
    x = 7,212,573,551.52/98,028
  6. Step 6: Final answer
    x = 73,576.67

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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.