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Finding the Fourth Proportional to 145,880.50, 201,315.09 and 78,812.50

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Solution

The fourth proportional to 145,880.50, 201,315.09 and 78,812.50 is: 108,761.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,880.50 : 201,315.09 = 78,812.50 : x
  2. Step 2: Convert to fraction form
    145,880.50/201,315.09 = 78,812.50/x
  3. Step 3: Cross multiply
    145,880.50x = 201,315.09 × 78,812.50
  4. Step 4: Simplify right side
    145,880.50x = 15,866,145,530.63
  5. Step 5: Solve for x
    x = 15,866,145,530.63/145,880.50
  6. Step 6: Final answer
    x = 108,761.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.