Home / 85,455.09-128,071.08-61,842.15

Finding the Fourth Proportional to 85,455.09, 128,071.08 and 61,842.15

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Solution

The fourth proportional to 85,455.09, 128,071.08 and 61,842.15 is: 92,682.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,455.09 : 128,071.08 = 61,842.15 : x
  2. Step 2: Convert to fraction form
    85,455.09/128,071.08 = 61,842.15/x
  3. Step 3: Cross multiply
    85,455.09x = 128,071.08 × 61,842.15
  4. Step 4: Simplify right side
    85,455.09x = 7,920,190,940.02
  5. Step 5: Solve for x
    x = 7,920,190,940.02/85,455.09
  6. Step 6: Final answer
    x = 92,682.49

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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.