Home / 88,396.40-121,980.24-56,128.64

Finding the Fourth Proportional to 88,396.40, 121,980.24 and 56,128.64

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Solution

The fourth proportional to 88,396.40, 121,980.24 and 56,128.64 is: 77,453.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,396.40 : 121,980.24 = 56,128.64 : x
  2. Step 2: Convert to fraction form
    88,396.40/121,980.24 = 56,128.64/x
  3. Step 3: Cross multiply
    88,396.40x = 121,980.24 × 56,128.64
  4. Step 4: Simplify right side
    88,396.40x = 6,846,584,978.07
  5. Step 5: Solve for x
    x = 6,846,584,978.07/88,396.40
  6. Step 6: Final answer
    x = 77,453.21

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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.