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Finding the Fourth Proportional to 145,790.80, 218,686.20 and 72,062.80

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Solution

The fourth proportional to 145,790.80, 218,686.20 and 72,062.80 is: 108,094.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,790.80 : 218,686.20 = 72,062.80 : x
  2. Step 2: Convert to fraction form
    145,790.80/218,686.20 = 72,062.80/x
  3. Step 3: Cross multiply
    145,790.80x = 218,686.20 × 72,062.80
  4. Step 4: Simplify right side
    145,790.80x = 15,759,139,893.36
  5. Step 5: Solve for x
    x = 15,759,139,893.36/145,790.80
  6. Step 6: Final answer
    x = 108,094.20

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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.