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Finding the Fourth Proportional to 154,059.52, 212,581.12 and 86,068.16

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Solution

The fourth proportional to 154,059.52, 212,581.12 and 86,068.16 is: 118,762.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,059.52 : 212,581.12 = 86,068.16 : x
  2. Step 2: Convert to fraction form
    154,059.52/212,581.12 = 86,068.16/x
  3. Step 3: Cross multiply
    154,059.52x = 212,581.12 × 86,068.16
  4. Step 4: Simplify right side
    154,059.52x = 18,296,465,849.14
  5. Step 5: Solve for x
    x = 18,296,465,849.14/154,059.52
  6. Step 6: Final answer
    x = 118,762.32

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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.