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Finding the Fourth Proportional to 128,065.32, 176,746.86 and 71,488.44

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Solution

The fourth proportional to 128,065.32, 176,746.86 and 71,488.44 is: 98,663.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,065.32 : 176,746.86 = 71,488.44 : x
  2. Step 2: Convert to fraction form
    128,065.32/176,746.86 = 71,488.44/x
  3. Step 3: Cross multiply
    128,065.32x = 176,746.86 × 71,488.44
  4. Step 4: Simplify right side
    128,065.32x = 12,635,357,296.30
  5. Step 5: Solve for x
    x = 12,635,357,296.30/128,065.32
  6. Step 6: Final answer
    x = 98,663.38

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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.