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Finding the Fourth Proportional to 72,869,439.60, 109,304,159.40 and 19,016,751.60

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Solution

The fourth proportional to 72,869,439.60, 109,304,159.40 and 19,016,751.60 is: 28,525,127.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,869,439.60 : 109,304,159.40 = 19,016,751.60 : x
  2. Step 2: Convert to fraction form
    72,869,439.60/109,304,159.40 = 19,016,751.60/x
  3. Step 3: Cross multiply
    72,869,439.60x = 109,304,159.40 × 19,016,751.60
  4. Step 4: Simplify right side
    72,869,439.60x = 2,078,610,048,156,605.25
  5. Step 5: Solve for x
    x = 2,078,610,048,156,605.25/72,869,439.60
  6. Step 6: Final answer
    x = 28,525,127.40

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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.