Home / 85,705.93-128,567.40-31,684.77

Finding the Fourth Proportional to 85,705.93, 128,567.40 and 31,684.77

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Solution

The fourth proportional to 85,705.93, 128,567.40 and 31,684.77 is: 47,530.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,705.93 : 128,567.40 = 31,684.77 : x
  2. Step 2: Convert to fraction form
    85,705.93/128,567.40 = 31,684.77/x
  3. Step 3: Cross multiply
    85,705.93x = 128,567.40 × 31,684.77
  4. Step 4: Simplify right side
    85,705.93x = 4,073,628,859.52
  5. Step 5: Solve for x
    x = 4,073,628,859.52/85,705.93
  6. Step 6: Final answer
    x = 47,530.30

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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.