Home / 81,121.60-111,946.62-45,312.13

Finding the Fourth Proportional to 81,121.60, 111,946.62 and 45,312.13

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Solution

The fourth proportional to 81,121.60, 111,946.62 and 45,312.13 is: 62,530.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,121.60 : 111,946.62 = 45,312.13 : x
  2. Step 2: Convert to fraction form
    81,121.60/111,946.62 = 45,312.13/x
  3. Step 3: Cross multiply
    81,121.60x = 111,946.62 × 45,312.13
  4. Step 4: Simplify right side
    81,121.60x = 5,072,539,798.50
  5. Step 5: Solve for x
    x = 5,072,539,798.50/81,121.60
  6. Step 6: Final answer
    x = 62,530.08

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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.