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Finding the Fourth Proportional to 70,046,068.40, 105,069,102.60 and 66,077,975.60

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Solution

The fourth proportional to 70,046,068.40, 105,069,102.60 and 66,077,975.60 is: 99,116,963.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,046,068.40 : 105,069,102.60 = 66,077,975.60 : x
  2. Step 2: Convert to fraction form
    70,046,068.40/105,069,102.60 = 66,077,975.60/x
  3. Step 3: Cross multiply
    70,046,068.40x = 105,069,102.60 × 66,077,975.60
  4. Step 4: Simplify right side
    70,046,068.40x = 6,942,753,597,916,696
  5. Step 5: Solve for x
    x = 6,942,753,597,916,696/70,046,068.40
  6. Step 6: Final answer
    x = 99,116,963.40

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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.