Home / 118,689.18-163,789.80-64,974.30

Finding the Fourth Proportional to 118,689.18, 163,789.80 and 64,974.30

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Solution

The fourth proportional to 118,689.18, 163,789.80 and 64,974.30 is: 89,663.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,689.18 : 163,789.80 = 64,974.30 : x
  2. Step 2: Convert to fraction form
    118,689.18/163,789.80 = 64,974.30/x
  3. Step 3: Cross multiply
    118,689.18x = 163,789.80 × 64,974.30
  4. Step 4: Simplify right side
    118,689.18x = 10,642,127,602.14
  5. Step 5: Solve for x
    x = 10,642,127,602.14/118,689.18
  6. Step 6: Final answer
    x = 89,663.84

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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.