Home / 426,482,666.40-639,724,025.52-103,366,538.40

Finding the Fourth Proportional to 426,482,666.40, 639,724,025.52 and 103,366,538.40

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Solution

The fourth proportional to 426,482,666.40, 639,724,025.52 and 103,366,538.40 is: 155,049,813.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,482,666.40 : 639,724,025.52 = 103,366,538.40 : x
  2. Step 2: Convert to fraction form
    426,482,666.40/639,724,025.52 = 103,366,538.40/x
  3. Step 3: Cross multiply
    426,482,666.40x = 639,724,025.52 × 103,366,538.40
  4. Step 4: Simplify right side
    426,482,666.40x = 66,126,058,049,315,664
  5. Step 5: Solve for x
    x = 66,126,058,049,315,664/426,482,666.40
  6. Step 6: Final answer
    x = 155,049,813.88

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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.