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Finding the Fourth Proportional to 66,514,869.60, 99,697,654.80 and 28,169,858.40

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Solution

The fourth proportional to 66,514,869.60, 99,697,654.80 and 28,169,858.40 is: 42,223,172.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,514,869.60 : 99,697,654.80 = 28,169,858.40 : x
  2. Step 2: Convert to fraction form
    66,514,869.60/99,697,654.80 = 28,169,858.40/x
  3. Step 3: Cross multiply
    66,514,869.60x = 99,697,654.80 × 28,169,858.40
  4. Step 4: Simplify right side
    66,514,869.60x = 2,808,468,818,528,080
  5. Step 5: Solve for x
    x = 2,808,468,818,528,080/66,514,869.60
  6. Step 6: Final answer
    x = 42,223,172.58

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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.