Home / 128,146.14-176,840.97-70,789.40

Finding the Fourth Proportional to 128,146.14, 176,840.97 and 70,789.40

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Solution

The fourth proportional to 128,146.14, 176,840.97 and 70,789.40 is: 97,688.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,146.14 : 176,840.97 = 70,789.40 : x
  2. Step 2: Convert to fraction form
    128,146.14/176,840.97 = 70,789.40/x
  3. Step 3: Cross multiply
    128,146.14x = 176,840.97 × 70,789.40
  4. Step 4: Simplify right side
    128,146.14x = 12,518,465,675.21
  5. Step 5: Solve for x
    x = 12,518,465,675.21/128,146.14
  6. Step 6: Final answer
    x = 97,688.98

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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.