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Finding the Fourth Proportional to 56,712.65, 78,258.80 and 32,840.87

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Solution

The fourth proportional to 56,712.65, 78,258.80 and 32,840.87 is: 45,317.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,712.65 : 78,258.80 = 32,840.87 : x
  2. Step 2: Convert to fraction form
    56,712.65/78,258.80 = 32,840.87/x
  3. Step 3: Cross multiply
    56,712.65x = 78,258.80 × 32,840.87
  4. Step 4: Simplify right side
    56,712.65x = 2,570,086,521.66
  5. Step 5: Solve for x
    x = 2,570,086,521.66/56,712.65
  6. Step 6: Final answer
    x = 45,317.70

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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.