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Finding the Fourth Proportional to 70,216.64, 96,875.30 and 39,980.57

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Solution

The fourth proportional to 70,216.64, 96,875.30 and 39,980.57 is: 55,159.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,216.64 : 96,875.30 = 39,980.57 : x
  2. Step 2: Convert to fraction form
    70,216.64/96,875.30 = 39,980.57/x
  3. Step 3: Cross multiply
    70,216.64x = 96,875.30 × 39,980.57
  4. Step 4: Simplify right side
    70,216.64x = 3,873,129,513.02
  5. Step 5: Solve for x
    x = 3,873,129,513.02/70,216.64
  6. Step 6: Final answer
    x = 55,159.71

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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.