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Finding the Fourth Proportional to 93,045.98, 128,415.70 and 90,512.82

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Solution

The fourth proportional to 93,045.98, 128,415.70 and 90,512.82 is: 124,919.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,045.98 : 128,415.70 = 90,512.82 : x
  2. Step 2: Convert to fraction form
    93,045.98/128,415.70 = 90,512.82/x
  3. Step 3: Cross multiply
    93,045.98x = 128,415.70 × 90,512.82
  4. Step 4: Simplify right side
    93,045.98x = 11,623,267,139.27
  5. Step 5: Solve for x
    x = 11,623,267,139.27/93,045.98
  6. Step 6: Final answer
    x = 124,919.61

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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.