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Finding the Fourth Proportional to 145,792.80, 218,689.20 and 72,064.80

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Solution

The fourth proportional to 145,792.80, 218,689.20 and 72,064.80 is: 108,097.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,792.80 : 218,689.20 = 72,064.80 : x
  2. Step 2: Convert to fraction form
    145,792.80/218,689.20 = 72,064.80/x
  3. Step 3: Cross multiply
    145,792.80x = 218,689.20 × 72,064.80
  4. Step 4: Simplify right side
    145,792.80x = 15,759,793,460.16
  5. Step 5: Solve for x
    x = 15,759,793,460.16/145,792.80
  6. Step 6: Final answer
    x = 108,097.20

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1.5x scale

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.