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Finding the Fourth Proportional to 128,015.34, 176,659.86 and 70,655.19

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Solution

The fourth proportional to 128,015.34, 176,659.86 and 70,655.19 is: 97,503.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,015.34 : 176,659.86 = 70,655.19 : x
  2. Step 2: Convert to fraction form
    128,015.34/176,659.86 = 70,655.19/x
  3. Step 3: Cross multiply
    128,015.34x = 176,659.86 × 70,655.19
  4. Step 4: Simplify right side
    128,015.34x = 12,481,935,973.67
  5. Step 5: Solve for x
    x = 12,481,935,973.67/128,015.34
  6. Step 6: Final answer
    x = 97,503.44

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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.