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Finding the Fourth Proportional to 128,271.54, 176,999.39 and 70,903.11

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Solution

The fourth proportional to 128,271.54, 176,999.39 and 70,903.11 is: 97,837.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,271.54 : 176,999.39 = 70,903.11 : x
  2. Step 2: Convert to fraction form
    128,271.54/176,999.39 = 70,903.11/x
  3. Step 3: Cross multiply
    128,271.54x = 176,999.39 × 70,903.11
  4. Step 4: Simplify right side
    128,271.54x = 12,549,807,219.10
  5. Step 5: Solve for x
    x = 12,549,807,219.10/128,271.54
  6. Step 6: Final answer
    x = 97,837.82

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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.