Home / 85,739.04-128,602.16-28,813.36

Finding the Fourth Proportional to 85,739.04, 128,602.16 and 28,813.36

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Solution

The fourth proportional to 85,739.04, 128,602.16 and 28,813.36 is: 43,217.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,739.04 : 128,602.16 = 28,813.36 : x
  2. Step 2: Convert to fraction form
    85,739.04/128,602.16 = 28,813.36/x
  3. Step 3: Cross multiply
    85,739.04x = 128,602.16 × 28,813.36
  4. Step 4: Simplify right side
    85,739.04x = 3,705,460,332.86
  5. Step 5: Solve for x
    x = 3,705,460,332.86/85,739.04
  6. Step 6: Final answer
    x = 43,217.89

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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.