Home / 102,686.09-153,678.68-86,064.89

Finding the Fourth Proportional to 102,686.09, 153,678.68 and 86,064.89

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Solution

The fourth proportional to 102,686.09, 153,678.68 and 86,064.89 is: 128,803.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,686.09 : 153,678.68 = 86,064.89 : x
  2. Step 2: Convert to fraction form
    102,686.09/153,678.68 = 86,064.89/x
  3. Step 3: Cross multiply
    102,686.09x = 153,678.68 × 86,064.89
  4. Step 4: Simplify right side
    102,686.09x = 13,226,338,259.22
  5. Step 5: Solve for x
    x = 13,226,338,259.22/102,686.09
  6. Step 6: Final answer
    x = 128,803.60

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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.