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Finding the Fourth Proportional to 112,803.40, 169,205.10 and 99,681.40

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Solution

The fourth proportional to 112,803.40, 169,205.10 and 99,681.40 is: 149,522.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,803.40 : 169,205.10 = 99,681.40 : x
  2. Step 2: Convert to fraction form
    112,803.40/169,205.10 = 99,681.40/x
  3. Step 3: Cross multiply
    112,803.40x = 169,205.10 × 99,681.40
  4. Step 4: Simplify right side
    112,803.40x = 16,866,601,255.14
  5. Step 5: Solve for x
    x = 16,866,601,255.14/112,803.40
  6. Step 6: Final answer
    x = 149,522.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.