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Finding the Fourth Proportional to 123,075.55, 184,501.95 and 85,653.55

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Solution

The fourth proportional to 123,075.55, 184,501.95 and 85,653.55 is: 128,402.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,075.55 : 184,501.95 = 85,653.55 : x
  2. Step 2: Convert to fraction form
    123,075.55/184,501.95 = 85,653.55/x
  3. Step 3: Cross multiply
    123,075.55x = 184,501.95 × 85,653.55
  4. Step 4: Simplify right side
    123,075.55x = 15,803,246,999.42
  5. Step 5: Solve for x
    x = 15,803,246,999.42/123,075.55
  6. Step 6: Final answer
    x = 128,402.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.