Home / 85,430.41-128,157.86-26,271.05

Finding the Fourth Proportional to 85,430.41, 128,157.86 and 26,271.05

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Solution

The fourth proportional to 85,430.41, 128,157.86 and 26,271.05 is: 39,410.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,430.41 : 128,157.86 = 26,271.05 : x
  2. Step 2: Convert to fraction form
    85,430.41/128,157.86 = 26,271.05/x
  3. Step 3: Cross multiply
    85,430.41x = 128,157.86 × 26,271.05
  4. Step 4: Simplify right side
    85,430.41x = 3,366,840,972.84
  5. Step 5: Solve for x
    x = 3,366,840,972.84/85,430.41
  6. Step 6: Final answer
    x = 39,410.33

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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.