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Finding the Fourth Proportional to 219,985,763.60, 329,978,645.40 and 99,053,411.60

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Solution

The fourth proportional to 219,985,763.60, 329,978,645.40 and 99,053,411.60 is: 148,580,117.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,985,763.60 : 329,978,645.40 = 99,053,411.60 : x
  2. Step 2: Convert to fraction form
    219,985,763.60/329,978,645.40 = 99,053,411.60/x
  3. Step 3: Cross multiply
    219,985,763.60x = 329,978,645.40 × 99,053,411.60
  4. Step 4: Simplify right side
    219,985,763.60x = 32,685,510,582,016,644
  5. Step 5: Solve for x
    x = 32,685,510,582,016,644/219,985,763.60
  6. Step 6: Final answer
    x = 148,580,117.40

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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.