Home / 103,629.65-155,444.48-78,746.45

Finding the Fourth Proportional to 103,629.65, 155,444.48 and 78,746.45

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Solution

The fourth proportional to 103,629.65, 155,444.48 and 78,746.45 is: 118,119.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,629.65 : 155,444.48 = 78,746.45 : x
  2. Step 2: Convert to fraction form
    103,629.65/155,444.48 = 78,746.45/x
  3. Step 3: Cross multiply
    103,629.65x = 155,444.48 × 78,746.45
  4. Step 4: Simplify right side
    103,629.65x = 12,240,700,972.10
  5. Step 5: Solve for x
    x = 12,240,700,972.10/103,629.65
  6. Step 6: Final answer
    x = 118,119.68

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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.