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Finding the Fourth Proportional to 99,798,979.20, 149,698,468.80 and 65,361,602.40

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Solution

The fourth proportional to 99,798,979.20, 149,698,468.80 and 65,361,602.40 is: 98,042,403.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,798,979.20 : 149,698,468.80 = 65,361,602.40 : x
  2. Step 2: Convert to fraction form
    99,798,979.20/149,698,468.80 = 65,361,602.40/x
  3. Step 3: Cross multiply
    99,798,979.20x = 149,698,468.80 × 65,361,602.40
  4. Step 4: Simplify right side
    99,798,979.20x = 9,784,531,797,594,406
  5. Step 5: Solve for x
    x = 9,784,531,797,594,406/99,798,979.20
  6. Step 6: Final answer
    x = 98,042,403.60

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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.