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Finding the Fourth Proportional to 135,492.16, 186,938.40 and 87,801.52

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Solution

The fourth proportional to 135,492.16, 186,938.40 and 87,801.52 is: 121,139.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,492.16 : 186,938.40 = 87,801.52 : x
  2. Step 2: Convert to fraction form
    135,492.16/186,938.40 = 87,801.52/x
  3. Step 3: Cross multiply
    135,492.16x = 186,938.40 × 87,801.52
  4. Step 4: Simplify right side
    135,492.16x = 16,413,475,666.37
  5. Step 5: Solve for x
    x = 16,413,475,666.37/135,492.16
  6. Step 6: Final answer
    x = 121,139.67

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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.