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Finding the Fourth Proportional to 101,330.40, 139,835.04 and 56,011.20

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Solution

The fourth proportional to 101,330.40, 139,835.04 and 56,011.20 is: 77,294.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,330.40 : 139,835.04 = 56,011.20 : x
  2. Step 2: Convert to fraction form
    101,330.40/139,835.04 = 56,011.20/x
  3. Step 3: Cross multiply
    101,330.40x = 139,835.04 × 56,011.20
  4. Step 4: Simplify right side
    101,330.40x = 7,832,328,392.45
  5. Step 5: Solve for x
    x = 7,832,328,392.45/101,330.40
  6. Step 6: Final answer
    x = 77,294.95

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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.