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Finding the Fourth Proportional to 66,429,005.70, 99,643,508.55 and 55,847,424.90

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Solution

The fourth proportional to 66,429,005.70, 99,643,508.55 and 55,847,424.90 is: 83,771,137.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,429,005.70 : 99,643,508.55 = 55,847,424.90 : x
  2. Step 2: Convert to fraction form
    66,429,005.70/99,643,508.55 = 55,847,424.90/x
  3. Step 3: Cross multiply
    66,429,005.70x = 99,643,508.55 × 55,847,424.90
  4. Step 4: Simplify right side
    66,429,005.70x = 5,564,833,360,518,633
  5. Step 5: Solve for x
    x = 5,564,833,360,518,633/66,429,005.70
  6. Step 6: Final answer
    x = 83,771,137.35

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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.