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Finding the Fourth Proportional to 178,080.40, 266,893.80 and 72,780.40

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Solution

The fourth proportional to 178,080.40, 266,893.80 and 72,780.40 is: 109,077.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,080.40 : 266,893.80 = 72,780.40 : x
  2. Step 2: Convert to fraction form
    178,080.40/266,893.80 = 72,780.40/x
  3. Step 3: Cross multiply
    178,080.40x = 266,893.80 × 72,780.40
  4. Step 4: Simplify right side
    178,080.40x = 19,424,637,521.52
  5. Step 5: Solve for x
    x = 19,424,637,521.52/178,080.40
  6. Step 6: Final answer
    x = 109,077.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.