Home / 138,683,807.20-208,025,710.80-70,659,359.20

Finding the Fourth Proportional to 138,683,807.20, 208,025,710.80 and 70,659,359.20

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Solution

The fourth proportional to 138,683,807.20, 208,025,710.80 and 70,659,359.20 is: 105,989,038.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,683,807.20 : 208,025,710.80 = 70,659,359.20 : x
  2. Step 2: Convert to fraction form
    138,683,807.20/208,025,710.80 = 70,659,359.20/x
  3. Step 3: Cross multiply
    138,683,807.20x = 208,025,710.80 × 70,659,359.20
  4. Step 4: Simplify right side
    138,683,807.20x = 14,698,963,422,252,520
  5. Step 5: Solve for x
    x = 14,698,963,422,252,520/138,683,807.20
  6. Step 6: Final answer
    x = 105,989,038.80

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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.