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Finding the Fourth Proportional to 92,403.40, 138,345.90 and 89,811.40

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Solution

The fourth proportional to 92,403.40, 138,345.90 and 89,811.40 is: 134,465.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,403.40 : 138,345.90 = 89,811.40 : x
  2. Step 2: Convert to fraction form
    92,403.40/138,345.90 = 89,811.40/x
  3. Step 3: Cross multiply
    92,403.40x = 138,345.90 × 89,811.40
  4. Step 4: Simplify right side
    92,403.40x = 12,425,038,963.26
  5. Step 5: Solve for x
    x = 12,425,038,963.26/92,403.40
  6. Step 6: Final answer
    x = 134,465.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.