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Finding the Fourth Proportional to 123,382.80, 185,117.40 and 53,312.40

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Solution

The fourth proportional to 123,382.80, 185,117.40 and 53,312.40 is: 79,987.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,382.80 : 185,117.40 = 53,312.40 : x
  2. Step 2: Convert to fraction form
    123,382.80/185,117.40 = 53,312.40/x
  3. Step 3: Cross multiply
    123,382.80x = 185,117.40 × 53,312.40
  4. Step 4: Simplify right side
    123,382.80x = 9,869,052,875.76
  5. Step 5: Solve for x
    x = 9,869,052,875.76/123,382.80
  6. Step 6: Final answer
    x = 79,987.27

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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.