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Finding the Fourth Proportional to 105,813.60, 158,720.40 and 104,258.40

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Solution

The fourth proportional to 105,813.60, 158,720.40 and 104,258.40 is: 156,387.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,813.60 : 158,720.40 = 104,258.40 : x
  2. Step 2: Convert to fraction form
    105,813.60/158,720.40 = 104,258.40/x
  3. Step 3: Cross multiply
    105,813.60x = 158,720.40 × 104,258.40
  4. Step 4: Simplify right side
    105,813.60x = 16,547,934,951.36
  5. Step 5: Solve for x
    x = 16,547,934,951.36/105,813.60
  6. Step 6: Final answer
    x = 156,387.60

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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.