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Finding the Fourth Proportional to 210,672.77, 316,133.96 and 77,646.47

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Solution

The fourth proportional to 210,672.77, 316,133.96 and 77,646.47 is: 116,515.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,672.77 : 316,133.96 = 77,646.47 : x
  2. Step 2: Convert to fraction form
    210,672.77/316,133.96 = 77,646.47/x
  3. Step 3: Cross multiply
    210,672.77x = 316,133.96 × 77,646.47
  4. Step 4: Simplify right side
    210,672.77x = 24,546,684,072.22
  5. Step 5: Solve for x
    x = 24,546,684,072.22/210,672.77
  6. Step 6: Final answer
    x = 116,515.70

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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.