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Finding the Fourth Proportional to 162,341.28, 243,347.76 and 77,978.16

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Solution

The fourth proportional to 162,341.28, 243,347.76 and 77,978.16 is: 116,888.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,341.28 : 243,347.76 = 77,978.16 : x
  2. Step 2: Convert to fraction form
    162,341.28/243,347.76 = 77,978.16/x
  3. Step 3: Cross multiply
    162,341.28x = 243,347.76 × 77,978.16
  4. Step 4: Simplify right side
    162,341.28x = 18,975,810,564.92
  5. Step 5: Solve for x
    x = 18,975,810,564.92/162,341.28
  6. Step 6: Final answer
    x = 116,888.39

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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.