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Finding the Fourth Proportional to 66,443,368.80, 99,665,053.20 and 65,323,624.80

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Solution

The fourth proportional to 66,443,368.80, 99,665,053.20 and 65,323,624.80 is: 97,985,437.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,443,368.80 : 99,665,053.20 = 65,323,624.80 : x
  2. Step 2: Convert to fraction form
    66,443,368.80/99,665,053.20 = 65,323,624.80/x
  3. Step 3: Cross multiply
    66,443,368.80x = 99,665,053.20 × 65,323,624.80
  4. Step 4: Simplify right side
    66,443,368.80x = 6,510,482,540,908,839
  5. Step 5: Solve for x
    x = 6,510,482,540,908,839/66,443,368.80
  6. Step 6: Final answer
    x = 97,985,437.20

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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.