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Finding the Fourth Proportional to 145,561.94, 200,901.92 and 85,128.98

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Solution

The fourth proportional to 145,561.94, 200,901.92 and 85,128.98 is: 117,493.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,561.94 : 200,901.92 = 85,128.98 : x
  2. Step 2: Convert to fraction form
    145,561.94/200,901.92 = 85,128.98/x
  3. Step 3: Cross multiply
    145,561.94x = 200,901.92 × 85,128.98
  4. Step 4: Simplify right side
    145,561.94x = 17,102,574,578.34
  5. Step 5: Solve for x
    x = 17,102,574,578.34/145,561.94
  6. Step 6: Final answer
    x = 117,493.45

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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.