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Finding the Fourth Proportional to 93,421.61, 128,921.12 and 53,135.33

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Solution

The fourth proportional to 93,421.61, 128,921.12 and 53,135.33 is: 73,326.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,421.61 : 128,921.12 = 53,135.33 : x
  2. Step 2: Convert to fraction form
    93,421.61/128,921.12 = 53,135.33/x
  3. Step 3: Cross multiply
    93,421.61x = 128,921.12 × 53,135.33
  4. Step 4: Simplify right side
    93,421.61x = 6,850,265,344.89
  5. Step 5: Solve for x
    x = 6,850,265,344.89/93,421.61
  6. Step 6: Final answer
    x = 73,326.34

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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.