Home / 103,780.60-155,669.30-70,417.72

Finding the Fourth Proportional to 103,780.60, 155,669.30 and 70,417.72

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Solution

The fourth proportional to 103,780.60, 155,669.30 and 70,417.72 is: 105,625.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,780.60 : 155,669.30 = 70,417.72 : x
  2. Step 2: Convert to fraction form
    103,780.60/155,669.30 = 70,417.72/x
  3. Step 3: Cross multiply
    103,780.60x = 155,669.30 × 70,417.72
  4. Step 4: Simplify right side
    103,780.60x = 10,961,877,180.00
  5. Step 5: Solve for x
    x = 10,961,877,180.00/103,780.60
  6. Step 6: Final answer
    x = 105,625.49

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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.