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Finding the Fourth Proportional to 118,688.94, 178,045.53 and 39,811.02

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Solution

The fourth proportional to 118,688.94, 178,045.53 and 39,811.02 is: 59,720.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,688.94 : 178,045.53 = 39,811.02 : x
  2. Step 2: Convert to fraction form
    118,688.94/178,045.53 = 39,811.02/x
  3. Step 3: Cross multiply
    118,688.94x = 178,045.53 × 39,811.02
  4. Step 4: Simplify right side
    118,688.94x = 7,088,174,155.74
  5. Step 5: Solve for x
    x = 7,088,174,155.74/118,688.94
  6. Step 6: Final answer
    x = 59,720.60

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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.