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Finding the Fourth Proportional to 70,596,112.80, 105,818,828.40 and 40,238,608.80

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Solution

The fourth proportional to 70,596,112.80, 105,818,828.40 and 40,238,608.80 is: 60,314,970.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,596,112.80 : 105,818,828.40 = 40,238,608.80 : x
  2. Step 2: Convert to fraction form
    70,596,112.80/105,818,828.40 = 40,238,608.80/x
  3. Step 3: Cross multiply
    70,596,112.80x = 105,818,828.40 × 40,238,608.80
  4. Step 4: Simplify right side
    70,596,112.80x = 4,258,002,439,661,930
  5. Step 5: Solve for x
    x = 4,258,002,439,661,930/70,596,112.80
  6. Step 6: Final answer
    x = 60,314,970.20

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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.