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Finding the Fourth Proportional to 191,856.60, 287,809.20 and 102,988.08

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Solution

The fourth proportional to 191,856.60, 287,809.20 and 102,988.08 is: 154,495.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,856.60 : 287,809.20 = 102,988.08 : x
  2. Step 2: Convert to fraction form
    191,856.60/287,809.20 = 102,988.08/x
  3. Step 3: Cross multiply
    191,856.60x = 287,809.20 × 102,988.08
  4. Step 4: Simplify right side
    191,856.60x = 29,640,916,914.34
  5. Step 5: Solve for x
    x = 29,640,916,914.34/191,856.60
  6. Step 6: Final answer
    x = 154,495.16

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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.