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Finding the Fourth Proportional to 76,789,662.60, 115,184,493.90 and 56,382,328.20

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Solution

The fourth proportional to 76,789,662.60, 115,184,493.90 and 56,382,328.20 is: 84,573,492.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,789,662.60 : 115,184,493.90 = 56,382,328.20 : x
  2. Step 2: Convert to fraction form
    76,789,662.60/115,184,493.90 = 56,382,328.20/x
  3. Step 3: Cross multiply
    76,789,662.60x = 115,184,493.90 × 56,382,328.20
  4. Step 4: Simplify right side
    76,789,662.60x = 6,494,369,938,620,699
  5. Step 5: Solve for x
    x = 6,494,369,938,620,699/76,789,662.60
  6. Step 6: Final answer
    x = 84,573,492.30

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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.