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Finding the Fourth Proportional to 108,328.60, 162,492.90 and 91,221.40

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Solution

The fourth proportional to 108,328.60, 162,492.90 and 91,221.40 is: 136,832.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,328.60 : 162,492.90 = 91,221.40 : x
  2. Step 2: Convert to fraction form
    108,328.60/162,492.90 = 91,221.40/x
  3. Step 3: Cross multiply
    108,328.60x = 162,492.90 × 91,221.40
  4. Step 4: Simplify right side
    108,328.60x = 14,822,829,828.06
  5. Step 5: Solve for x
    x = 14,822,829,828.06/108,328.60
  6. Step 6: Final answer
    x = 136,832.10

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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.