Home / 85,830.72-128,783.07-46,415.58

Finding the Fourth Proportional to 85,830.72, 128,783.07 and 46,415.58

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Solution

The fourth proportional to 85,830.72, 128,783.07 and 46,415.58 is: 69,643.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,830.72 : 128,783.07 = 46,415.58 : x
  2. Step 2: Convert to fraction form
    85,830.72/128,783.07 = 46,415.58/x
  3. Step 3: Cross multiply
    85,830.72x = 128,783.07 × 46,415.58
  4. Step 4: Simplify right side
    85,830.72x = 5,977,540,888.23
  5. Step 5: Solve for x
    x = 5,977,540,888.23/85,830.72
  6. Step 6: Final answer
    x = 69,643.37

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1.5x scale

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.