Home / 57,130.56-78,840.16-31,980.16

Finding the Fourth Proportional to 57,130.56, 78,840.16 and 31,980.16

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Solution

The fourth proportional to 57,130.56, 78,840.16 and 31,980.16 is: 44,132.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,130.56 : 78,840.16 = 31,980.16 : x
  2. Step 2: Convert to fraction form
    57,130.56/78,840.16 = 31,980.16/x
  3. Step 3: Cross multiply
    57,130.56x = 78,840.16 × 31,980.16
  4. Step 4: Simplify right side
    57,130.56x = 2,521,320,931.23
  5. Step 5: Solve for x
    x = 2,521,320,931.23/57,130.56
  6. Step 6: Final answer
    x = 44,132.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.