Home / 85,415,630.40-128,123,445.60-71,054,913.60

Finding the Fourth Proportional to 85,415,630.40, 128,123,445.60 and 71,054,913.60

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Solution

The fourth proportional to 85,415,630.40, 128,123,445.60 and 71,054,913.60 is: 106,582,370.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,415,630.40 : 128,123,445.60 = 71,054,913.60 : x
  2. Step 2: Convert to fraction form
    85,415,630.40/128,123,445.60 = 71,054,913.60/x
  3. Step 3: Cross multiply
    85,415,630.40x = 128,123,445.60 × 71,054,913.60
  4. Step 4: Simplify right side
    85,415,630.40x = 9,103,800,357,242,298
  5. Step 5: Solve for x
    x = 9,103,800,357,242,298/85,415,630.40
  6. Step 6: Final answer
    x = 106,582,370.40

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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.