Home / 80,860,485.60-121,290,728.40-78,734,721.60

Finding the Fourth Proportional to 80,860,485.60, 121,290,728.40 and 78,734,721.60

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Solution

The fourth proportional to 80,860,485.60, 121,290,728.40 and 78,734,721.60 is: 118,102,082.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,860,485.60 : 121,290,728.40 = 78,734,721.60 : x
  2. Step 2: Convert to fraction form
    80,860,485.60/121,290,728.40 = 78,734,721.60/x
  3. Step 3: Cross multiply
    80,860,485.60x = 121,290,728.40 × 78,734,721.60
  4. Step 4: Simplify right side
    80,860,485.60x = 9,549,791,733,235,214
  5. Step 5: Solve for x
    x = 9,549,791,733,235,214/80,860,485.60
  6. Step 6: Final answer
    x = 118,102,082.40

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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.