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Finding the Fourth Proportional to 287,661.70, 431,492.55 and 100,692.10

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Solution

The fourth proportional to 287,661.70, 431,492.55 and 100,692.10 is: 151,038.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,661.70 : 431,492.55 = 100,692.10 : x
  2. Step 2: Convert to fraction form
    287,661.70/431,492.55 = 100,692.10/x
  3. Step 3: Cross multiply
    287,661.70x = 431,492.55 × 100,692.10
  4. Step 4: Simplify right side
    287,661.70x = 43,447,890,993.86
  5. Step 5: Solve for x
    x = 43,447,890,993.86/287,661.70
  6. Step 6: Final answer
    x = 151,038.15

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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.