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Finding the Fourth Proportional to 128,030.98, 176,704.32 and 74,360.92

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Solution

The fourth proportional to 128,030.98, 176,704.32 and 74,360.92 is: 102,630.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,030.98 : 176,704.32 = 74,360.92 : x
  2. Step 2: Convert to fraction form
    128,030.98/176,704.32 = 74,360.92/x
  3. Step 3: Cross multiply
    128,030.98x = 176,704.32 × 74,360.92
  4. Step 4: Simplify right side
    128,030.98x = 13,139,895,803.17
  5. Step 5: Solve for x
    x = 13,139,895,803.17/128,030.98
  6. Step 6: Final answer
    x = 102,630.60

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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.