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Finding the Fourth Proportional to 210,757.76, 316,136.28 and 98,400.32

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Solution

The fourth proportional to 210,757.76, 316,136.28 and 98,400.32 is: 147,600.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,757.76 : 316,136.28 = 98,400.32 : x
  2. Step 2: Convert to fraction form
    210,757.76/316,136.28 = 98,400.32/x
  3. Step 3: Cross multiply
    210,757.76x = 316,136.28 × 98,400.32
  4. Step 4: Simplify right side
    210,757.76x = 31,107,911,115.61
  5. Step 5: Solve for x
    x = 31,107,911,115.61/210,757.76
  6. Step 6: Final answer
    x = 147,600.31

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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.