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Finding the Fourth Proportional to 128,298.90, 177,045.36 and 70,934.88

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Solution

The fourth proportional to 128,298.90, 177,045.36 and 70,934.88 is: 97,886.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,298.90 : 177,045.36 = 70,934.88 : x
  2. Step 2: Convert to fraction form
    128,298.90/177,045.36 = 70,934.88/x
  3. Step 3: Cross multiply
    128,298.90x = 177,045.36 × 70,934.88
  4. Step 4: Simplify right side
    128,298.90x = 12,558,691,366.16
  5. Step 5: Solve for x
    x = 12,558,691,366.16/128,298.90
  6. Step 6: Final answer
    x = 97,886.20

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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.