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Finding the Fourth Proportional to 128,237.98, 176,977.58 and 70,876.07

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Solution

The fourth proportional to 128,237.98, 176,977.58 and 70,876.07 is: 97,814.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,237.98 : 176,977.58 = 70,876.07 : x
  2. Step 2: Convert to fraction form
    128,237.98/176,977.58 = 70,876.07/x
  3. Step 3: Cross multiply
    128,237.98x = 176,977.58 × 70,876.07
  4. Step 4: Simplify right side
    128,237.98x = 12,543,475,259.92
  5. Step 5: Solve for x
    x = 12,543,475,259.92/128,237.98
  6. Step 6: Final answer
    x = 97,814.04

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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.