Home / 85,455.74-128,172.96-53,437.59

Finding the Fourth Proportional to 85,455.74, 128,172.96 and 53,437.59

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Solution

The fourth proportional to 85,455.74, 128,172.96 and 53,437.59 is: 80,149.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,455.74 : 128,172.96 = 53,437.59 : x
  2. Step 2: Convert to fraction form
    85,455.74/128,172.96 = 53,437.59/x
  3. Step 3: Cross multiply
    85,455.74x = 128,172.96 × 53,437.59
  4. Step 4: Simplify right side
    85,455.74x = 6,849,254,085.57
  5. Step 5: Solve for x
    x = 6,849,254,085.57/85,455.74
  6. Step 6: Final answer
    x = 80,149.73

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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.