Home / 139,036.02-191,869.20-77,782.35

Finding the Fourth Proportional to 139,036.02, 191,869.20 and 77,782.35

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Solution

The fourth proportional to 139,036.02, 191,869.20 and 77,782.35 is: 107,339.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,036.02 : 191,869.20 = 77,782.35 : x
  2. Step 2: Convert to fraction form
    139,036.02/191,869.20 = 77,782.35/x
  3. Step 3: Cross multiply
    139,036.02x = 191,869.20 × 77,782.35
  4. Step 4: Simplify right side
    139,036.02x = 14,924,037,268.62
  5. Step 5: Solve for x
    x = 14,924,037,268.62/139,036.02
  6. Step 6: Final answer
    x = 107,339.36

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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.