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Finding the Fourth Proportional to 66,105,105.60, 99,157,658.40 and 40,239,019.20

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Solution

The fourth proportional to 66,105,105.60, 99,157,658.40 and 40,239,019.20 is: 60,358,528.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,105,105.60 : 99,157,658.40 = 40,239,019.20 : x
  2. Step 2: Convert to fraction form
    66,105,105.60/99,157,658.40 = 40,239,019.20/x
  3. Step 3: Cross multiply
    66,105,105.60x = 99,157,658.40 × 40,239,019.20
  4. Step 4: Simplify right side
    66,105,105.60x = 3,990,006,920,184,642
  5. Step 5: Solve for x
    x = 3,990,006,920,184,642/66,105,105.60
  6. Step 6: Final answer
    x = 60,358,528.80

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1.5x scale

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.