Home / 83,405.36-115,095.12-45,678.80

Finding the Fourth Proportional to 83,405.36, 115,095.12 and 45,678.80

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Solution

The fourth proportional to 83,405.36, 115,095.12 and 45,678.80 is: 63,034.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,405.36 : 115,095.12 = 45,678.80 : x
  2. Step 2: Convert to fraction form
    83,405.36/115,095.12 = 45,678.80/x
  3. Step 3: Cross multiply
    83,405.36x = 115,095.12 × 45,678.80
  4. Step 4: Simplify right side
    83,405.36x = 5,257,406,967.46
  5. Step 5: Solve for x
    x = 5,257,406,967.46/83,405.36
  6. Step 6: Final answer
    x = 63,034.40

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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.