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Finding the Fourth Proportional to 43,019,905.20, 64,529,857.80 and 38,316,980.40

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Solution

The fourth proportional to 43,019,905.20, 64,529,857.80 and 38,316,980.40 is: 57,475,470.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,019,905.20 : 64,529,857.80 = 38,316,980.40 : x
  2. Step 2: Convert to fraction form
    43,019,905.20/64,529,857.80 = 38,316,980.40/x
  3. Step 3: Cross multiply
    43,019,905.20x = 64,529,857.80 × 38,316,980.40
  4. Step 4: Simplify right side
    43,019,905.20x = 2,472,589,296,537,387
  5. Step 5: Solve for x
    x = 2,472,589,296,537,387/43,019,905.20
  6. Step 6: Final answer
    x = 57,475,470.60

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1.5x scale

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.