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Finding the Fourth Proportional to 101,030.64, 139,421.17 and 55,712.60

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Solution

The fourth proportional to 101,030.64, 139,421.17 and 55,712.60 is: 76,882.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,030.64 : 139,421.17 = 55,712.60 : x
  2. Step 2: Convert to fraction form
    101,030.64/139,421.17 = 55,712.60/x
  3. Step 3: Cross multiply
    101,030.64x = 139,421.17 × 55,712.60
  4. Step 4: Simplify right side
    101,030.64x = 7,767,515,875.74
  5. Step 5: Solve for x
    x = 7,767,515,875.74/101,030.64
  6. Step 6: Final answer
    x = 76,882.77

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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.