Home / 72,771,378.80-109,157,068.20-66,819,239.60

Finding the Fourth Proportional to 72,771,378.80, 109,157,068.20 and 66,819,239.60

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Solution

The fourth proportional to 72,771,378.80, 109,157,068.20 and 66,819,239.60 is: 100,228,859.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,771,378.80 : 109,157,068.20 = 66,819,239.60 : x
  2. Step 2: Convert to fraction form
    72,771,378.80/109,157,068.20 = 66,819,239.60/x
  3. Step 3: Cross multiply
    72,771,378.80x = 109,157,068.20 × 66,819,239.60
  4. Step 4: Simplify right side
    72,771,378.80x = 7,293,792,294,089,341
  5. Step 5: Solve for x
    x = 7,293,792,294,089,341/72,771,378.80
  6. Step 6: Final answer
    x = 100,228,859.40

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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.