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Finding the Fourth Proportional to 98,280.48, 146,705.64 and 85,838.88

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Solution

The fourth proportional to 98,280.48, 146,705.64 and 85,838.88 is: 128,133.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,280.48 : 146,705.64 = 85,838.88 : x
  2. Step 2: Convert to fraction form
    98,280.48/146,705.64 = 85,838.88/x
  3. Step 3: Cross multiply
    98,280.48x = 146,705.64 × 85,838.88
  4. Step 4: Simplify right side
    98,280.48x = 12,593,047,827.28
  5. Step 5: Solve for x
    x = 12,593,047,827.28/98,280.48
  6. Step 6: Final answer
    x = 128,133.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.