Home / 72,842,486.40-109,263,729.60-18,989,798.40

Finding the Fourth Proportional to 72,842,486.40, 109,263,729.60 and 18,989,798.40

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Solution

The fourth proportional to 72,842,486.40, 109,263,729.60 and 18,989,798.40 is: 28,484,697.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,842,486.40 : 109,263,729.60 = 18,989,798.40 : x
  2. Step 2: Convert to fraction form
    72,842,486.40/109,263,729.60 = 18,989,798.40/x
  3. Step 3: Cross multiply
    72,842,486.40x = 109,263,729.60 × 18,989,798.40
  4. Step 4: Simplify right side
    72,842,486.40x = 2,074,896,197,536,112.25
  5. Step 5: Solve for x
    x = 2,074,896,197,536,112.25/72,842,486.40
  6. Step 6: Final answer
    x = 28,484,697.60

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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.