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Finding the Fourth Proportional to 93,485.16, 128,965.86 and 63,261

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Solution

The fourth proportional to 93,485.16, 128,965.86 and 63,261 is: 87,270.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,485.16 : 128,965.86 = 63,261 : x
  2. Step 2: Convert to fraction form
    93,485.16/128,965.86 = 63,261/x
  3. Step 3: Cross multiply
    93,485.16x = 128,965.86 × 63,261
  4. Step 4: Simplify right side
    93,485.16x = 8,158,509,269.46
  5. Step 5: Solve for x
    x = 8,158,509,269.46/93,485.16
  6. Step 6: Final answer
    x = 87,270.63

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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.