Home / 85,657,763.60-128,486,645.40-45,346,979.60

Finding the Fourth Proportional to 85,657,763.60, 128,486,645.40 and 45,346,979.60

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Solution

The fourth proportional to 85,657,763.60, 128,486,645.40 and 45,346,979.60 is: 68,020,469.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,657,763.60 : 128,486,645.40 = 45,346,979.60 : x
  2. Step 2: Convert to fraction form
    85,657,763.60/128,486,645.40 = 45,346,979.60/x
  3. Step 3: Cross multiply
    85,657,763.60x = 128,486,645.40 × 45,346,979.60
  4. Step 4: Simplify right side
    85,657,763.60x = 5,826,481,287,826,234
  5. Step 5: Solve for x
    x = 5,826,481,287,826,234/85,657,763.60
  6. Step 6: Final answer
    x = 68,020,469.40

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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.