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Finding the Fourth Proportional to 105,868,276.80, 158,951,714.40 and 65,557,492.80

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Solution

The fourth proportional to 105,868,276.80, 158,951,714.40 and 65,557,492.80 is: 98,428,690.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,868,276.80 : 158,951,714.40 = 65,557,492.80 : x
  2. Step 2: Convert to fraction form
    105,868,276.80/158,951,714.40 = 65,557,492.80/x
  3. Step 3: Cross multiply
    105,868,276.80x = 158,951,714.40 × 65,557,492.80
  4. Step 4: Simplify right side
    105,868,276.80x = 10,420,475,872,325,656
  5. Step 5: Solve for x
    x = 10,420,475,872,325,656/105,868,276.80
  6. Step 6: Final answer
    x = 98,428,690.70

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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.