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Finding the Fourth Proportional to 153,639.03, 230,505.53 and 78,812.04

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Solution

The fourth proportional to 153,639.03, 230,505.53 and 78,812.04 is: 118,242.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,639.03 : 230,505.53 = 78,812.04 : x
  2. Step 2: Convert to fraction form
    153,639.03/230,505.53 = 78,812.04/x
  3. Step 3: Cross multiply
    153,639.03x = 230,505.53 × 78,812.04
  4. Step 4: Simplify right side
    153,639.03x = 18,166,610,656.52
  5. Step 5: Solve for x
    x = 18,166,610,656.52/153,639.03
  6. Step 6: Final answer
    x = 118,242.16

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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.