Home / 138,154,665.60-190,670,157.20-78,630,434.96

Finding the Fourth Proportional to 138,154,665.60, 190,670,157.20 and 78,630,434.96

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Solution

The fourth proportional to 138,154,665.60, 190,670,157.20 and 78,630,434.96 is: 108,519,515.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,154,665.60 : 190,670,157.20 = 78,630,434.96 : x
  2. Step 2: Convert to fraction form
    138,154,665.60/190,670,157.20 = 78,630,434.96/x
  3. Step 3: Cross multiply
    138,154,665.60x = 190,670,157.20 × 78,630,434.96
  4. Step 4: Simplify right side
    138,154,665.60x = 14,992,477,394,527,574
  5. Step 5: Solve for x
    x = 14,992,477,394,527,574/138,154,665.60
  6. Step 6: Final answer
    x = 108,519,515.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.