Home / 85,904.90-128,861.40-70,884.16

Finding the Fourth Proportional to 85,904.90, 128,861.40 and 70,884.16

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Solution

The fourth proportional to 85,904.90, 128,861.40 and 70,884.16 is: 106,329.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,904.90 : 128,861.40 = 70,884.16 : x
  2. Step 2: Convert to fraction form
    85,904.90/128,861.40 = 70,884.16/x
  3. Step 3: Cross multiply
    85,904.90x = 128,861.40 × 70,884.16
  4. Step 4: Simplify right side
    85,904.90x = 9,134,232,522.32
  5. Step 5: Solve for x
    x = 9,134,232,522.32/85,904.90
  6. Step 6: Final answer
    x = 106,329.58

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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.