Home / 85,358,830.54-128,038,581.96-20,662,531.69

Finding the Fourth Proportional to 85,358,830.54, 128,038,581.96 and 20,662,531.69

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Solution

The fourth proportional to 85,358,830.54, 128,038,581.96 and 20,662,531.69 is: 30,993,878.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,358,830.54 : 128,038,581.96 = 20,662,531.69 : x
  2. Step 2: Convert to fraction form
    85,358,830.54/128,038,581.96 = 20,662,531.69/x
  3. Step 3: Cross multiply
    85,358,830.54x = 128,038,581.96 × 20,662,531.69
  4. Step 4: Simplify right side
    85,358,830.54x = 2,645,601,257,291,162.50
  5. Step 5: Solve for x
    x = 2,645,601,257,291,162.50/85,358,830.54
  6. Step 6: Final answer
    x = 30,993,878.91

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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.