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Finding the Fourth Proportional to 101,038.95, 139,430.55 and 55,718.84

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Solution

The fourth proportional to 101,038.95, 139,430.55 and 55,718.84 is: 76,890.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,038.95 : 139,430.55 = 55,718.84 : x
  2. Step 2: Convert to fraction form
    101,038.95/139,430.55 = 55,718.84/x
  3. Step 3: Cross multiply
    101,038.95x = 139,430.55 × 55,718.84
  4. Step 4: Simplify right side
    101,038.95x = 7,768,908,855.14
  5. Step 5: Solve for x
    x = 7,768,908,855.14/101,038.95
  6. Step 6: Final answer
    x = 76,890.24

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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.