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Finding the Fourth Proportional to 70,449,840.40, 105,674,760.60 and 40,216,752.40

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Solution

The fourth proportional to 70,449,840.40, 105,674,760.60 and 40,216,752.40 is: 60,325,128.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,449,840.40 : 105,674,760.60 = 40,216,752.40 : x
  2. Step 2: Convert to fraction form
    70,449,840.40/105,674,760.60 = 40,216,752.40/x
  3. Step 3: Cross multiply
    70,449,840.40x = 105,674,760.60 × 40,216,752.40
  4. Step 4: Simplify right side
    70,449,840.40x = 4,249,895,681,979,475
  5. Step 5: Solve for x
    x = 4,249,895,681,979,475/70,449,840.40
  6. Step 6: Final answer
    x = 60,325,128.60

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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.