Home / 78,722,170.56-118,079,056.80-21,213,518.40

Finding the Fourth Proportional to 78,722,170.56, 118,079,056.80 and 21,213,518.40

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Solution

The fourth proportional to 78,722,170.56, 118,079,056.80 and 21,213,518.40 is: 31,819,146.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,722,170.56 : 118,079,056.80 = 21,213,518.40 : x
  2. Step 2: Convert to fraction form
    78,722,170.56/118,079,056.80 = 21,213,518.40/x
  3. Step 3: Cross multiply
    78,722,170.56x = 118,079,056.80 × 21,213,518.40
  4. Step 4: Simplify right side
    78,722,170.56x = 2,504,872,244,081,445
  5. Step 5: Solve for x
    x = 2,504,872,244,081,445/78,722,170.56
  6. Step 6: Final answer
    x = 31,819,146.07

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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.