Home / 85,615.10-128,390.72-29,439.32

Finding the Fourth Proportional to 85,615.10, 128,390.72 and 29,439.32

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Solution

The fourth proportional to 85,615.10, 128,390.72 and 29,439.32 is: 44,148.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,615.10 : 128,390.72 = 29,439.32 : x
  2. Step 2: Convert to fraction form
    85,615.10/128,390.72 = 29,439.32/x
  3. Step 3: Cross multiply
    85,615.10x = 128,390.72 × 29,439.32
  4. Step 4: Simplify right side
    85,615.10x = 3,779,735,491.11
  5. Step 5: Solve for x
    x = 3,779,735,491.11/85,615.10
  6. Step 6: Final answer
    x = 44,148.00

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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.