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Finding the Fourth Proportional to 100,030.61, 138,037.10 and 54,699.77

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Solution

The fourth proportional to 100,030.61, 138,037.10 and 54,699.77 is: 75,482.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,030.61 : 138,037.10 = 54,699.77 : x
  2. Step 2: Convert to fraction form
    100,030.61/138,037.10 = 54,699.77/x
  3. Step 3: Cross multiply
    100,030.61x = 138,037.10 × 54,699.77
  4. Step 4: Simplify right side
    100,030.61x = 7,550,597,693.06
  5. Step 5: Solve for x
    x = 7,550,597,693.06/100,030.61
  6. Step 6: Final answer
    x = 75,482.87

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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.