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Finding the Fourth Proportional to 43,471,985.60, 65,207,978.40 and 28,166,484.80

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Solution

The fourth proportional to 43,471,985.60, 65,207,978.40 and 28,166,484.80 is: 42,249,727.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,471,985.60 : 65,207,978.40 = 28,166,484.80 : x
  2. Step 2: Convert to fraction form
    43,471,985.60/65,207,978.40 = 28,166,484.80/x
  3. Step 3: Cross multiply
    43,471,985.60x = 65,207,978.40 × 28,166,484.80
  4. Step 4: Simplify right side
    43,471,985.60x = 1,836,679,532,442,328.25
  5. Step 5: Solve for x
    x = 1,836,679,532,442,328.25/43,471,985.60
  6. Step 6: Final answer
    x = 42,249,727.20

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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.