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Finding the Fourth Proportional to 93,438.25, 128,948.34 and 53,155.69

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Solution

The fourth proportional to 93,438.25, 128,948.34 and 53,155.69 is: 73,356.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,438.25 : 128,948.34 = 53,155.69 : x
  2. Step 2: Convert to fraction form
    93,438.25/128,948.34 = 53,155.69/x
  3. Step 3: Cross multiply
    93,438.25x = 128,948.34 × 53,155.69
  4. Step 4: Simplify right side
    93,438.25x = 6,854,337,987.05
  5. Step 5: Solve for x
    x = 6,854,337,987.05/93,438.25
  6. Step 6: Final answer
    x = 73,356.87

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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.