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Finding the Fourth Proportional to 128,031.84, 176,681.52 and 70,676.82

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Solution

The fourth proportional to 128,031.84, 176,681.52 and 70,676.82 is: 97,532.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,031.84 : 176,681.52 = 70,676.82 : x
  2. Step 2: Convert to fraction form
    128,031.84/176,681.52 = 70,676.82/x
  3. Step 3: Cross multiply
    128,031.84x = 176,681.52 × 70,676.82
  4. Step 4: Simplify right side
    128,031.84x = 12,487,287,986.37
  5. Step 5: Solve for x
    x = 12,487,287,986.37/128,031.84
  6. Step 6: Final answer
    x = 97,532.68

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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.