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Finding the Fourth Proportional to 101,218.68, 139,681.98 and 56,506.68

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Solution

The fourth proportional to 101,218.68, 139,681.98 and 56,506.68 is: 77,979.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,218.68 : 139,681.98 = 56,506.68 : x
  2. Step 2: Convert to fraction form
    101,218.68/139,681.98 = 56,506.68/x
  3. Step 3: Cross multiply
    101,218.68x = 139,681.98 × 56,506.68
  4. Step 4: Simplify right side
    101,218.68x = 7,892,964,945.63
  5. Step 5: Solve for x
    x = 7,892,964,945.63/101,218.68
  6. Step 6: Final answer
    x = 77,979.33

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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.