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Finding the Fourth Proportional to 68,984,827.20, 103,477,240.80 and 20,464,430.40

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Solution

The fourth proportional to 68,984,827.20, 103,477,240.80 and 20,464,430.40 is: 30,696,645.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,984,827.20 : 103,477,240.80 = 20,464,430.40 : x
  2. Step 2: Convert to fraction form
    68,984,827.20/103,477,240.80 = 20,464,430.40/x
  3. Step 3: Cross multiply
    68,984,827.20x = 103,477,240.80 × 20,464,430.40
  4. Step 4: Simplify right side
    68,984,827.20x = 2,117,602,792,335,640
  5. Step 5: Solve for x
    x = 2,117,602,792,335,640/68,984,827.20
  6. Step 6: Final answer
    x = 30,696,645.60

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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.