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Finding the Fourth Proportional to 98,710.50, 136,223.73 and 53,998.50

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Solution

The fourth proportional to 98,710.50, 136,223.73 and 53,998.50 is: 74,519.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,710.50 : 136,223.73 = 53,998.50 : x
  2. Step 2: Convert to fraction form
    98,710.50/136,223.73 = 53,998.50/x
  3. Step 3: Cross multiply
    98,710.50x = 136,223.73 × 53,998.50
  4. Step 4: Simplify right side
    98,710.50x = 7,355,877,084.41
  5. Step 5: Solve for x
    x = 7,355,877,084.41/98,710.50
  6. Step 6: Final answer
    x = 74,519.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.