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Finding the Fourth Proportional to 85,803,572.60, 128,705,358.90 and 45,492,788.60

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Solution

The fourth proportional to 85,803,572.60, 128,705,358.90 and 45,492,788.60 is: 68,239,182.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,803,572.60 : 128,705,358.90 = 45,492,788.60 : x
  2. Step 2: Convert to fraction form
    85,803,572.60/128,705,358.90 = 45,492,788.60/x
  3. Step 3: Cross multiply
    85,803,572.60x = 128,705,358.90 × 45,492,788.60
  4. Step 4: Simplify right side
    85,803,572.60x = 5,855,165,684,124,829
  5. Step 5: Solve for x
    x = 5,855,165,684,124,829/85,803,572.60
  6. Step 6: Final answer
    x = 68,239,182.90

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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.