Home / 66,429,705.20-99,625,895.40-21,005,423.60

Finding the Fourth Proportional to 66,429,705.20, 99,625,895.40 and 21,005,423.60

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Solution

The fourth proportional to 66,429,705.20, 99,625,895.40 and 21,005,423.60 is: 31,502,234.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,429,705.20 : 99,625,895.40 = 21,005,423.60 : x
  2. Step 2: Convert to fraction form
    66,429,705.20/99,625,895.40 = 21,005,423.60/x
  3. Step 3: Cross multiply
    66,429,705.20x = 99,625,895.40 × 21,005,423.60
  4. Step 4: Simplify right side
    66,429,705.20x = 2,092,684,134,406,291.75
  5. Step 5: Solve for x
    x = 2,092,684,134,406,291.75/66,429,705.20
  6. Step 6: Final answer
    x = 31,502,234.25

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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.