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Finding the Fourth Proportional to 93,457.64, 128,986.08 and 55,221.32

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Solution

The fourth proportional to 93,457.64, 128,986.08 and 55,221.32 is: 76,214.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,457.64 : 128,986.08 = 55,221.32 : x
  2. Step 2: Convert to fraction form
    93,457.64/128,986.08 = 55,221.32/x
  3. Step 3: Cross multiply
    93,457.64x = 128,986.08 × 55,221.32
  4. Step 4: Simplify right side
    93,457.64x = 7,122,781,599.23
  5. Step 5: Solve for x
    x = 7,122,781,599.23/93,457.64
  6. Step 6: Final answer
    x = 76,214.01

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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.