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Finding the Fourth Proportional to 93,430.32, 128,950.56 and 55,707

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Solution

The fourth proportional to 93,430.32, 128,950.56 and 55,707 is: 76,885.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,430.32 : 128,950.56 = 55,707 : x
  2. Step 2: Convert to fraction form
    93,430.32/128,950.56 = 55,707/x
  3. Step 3: Cross multiply
    93,430.32x = 128,950.56 × 55,707
  4. Step 4: Simplify right side
    93,430.32x = 7,183,448,845.92
  5. Step 5: Solve for x
    x = 7,183,448,845.92/93,430.32
  6. Step 6: Final answer
    x = 76,885.63

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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.