Home / 103,663.15-155,306.09-72,006.32

Finding the Fourth Proportional to 103,663.15, 155,306.09 and 72,006.32

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Solution

The fourth proportional to 103,663.15, 155,306.09 and 72,006.32 is: 107,878.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,663.15 : 155,306.09 = 72,006.32 : x
  2. Step 2: Convert to fraction form
    103,663.15/155,306.09 = 72,006.32/x
  3. Step 3: Cross multiply
    103,663.15x = 155,306.09 × 72,006.32
  4. Step 4: Simplify right side
    103,663.15x = 11,183,020,014.49
  5. Step 5: Solve for x
    x = 11,183,020,014.49/103,663.15
  6. Step 6: Final answer
    x = 107,878.45

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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.