Home / 85,931.60-128,887.79-26,762.31

Finding the Fourth Proportional to 85,931.60, 128,887.79 and 26,762.31

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Solution

The fourth proportional to 85,931.60, 128,887.79 and 26,762.31 is: 40,140.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,931.60 : 128,887.79 = 26,762.31 : x
  2. Step 2: Convert to fraction form
    85,931.60/128,887.79 = 26,762.31/x
  3. Step 3: Cross multiply
    85,931.60x = 128,887.79 × 26,762.31
  4. Step 4: Simplify right side
    85,931.60x = 3,449,334,857.38
  5. Step 5: Solve for x
    x = 3,449,334,857.38/85,931.60
  6. Step 6: Final answer
    x = 40,140.47

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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.