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Finding the Fourth Proportional to 105,089.40, 157,374.90 and 69,838.20

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Solution

The fourth proportional to 105,089.40, 157,374.90 and 69,838.20 is: 104,585.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,089.40 : 157,374.90 = 69,838.20 : x
  2. Step 2: Convert to fraction form
    105,089.40/157,374.90 = 69,838.20/x
  3. Step 3: Cross multiply
    105,089.40x = 157,374.90 × 69,838.20
  4. Step 4: Simplify right side
    105,089.40x = 10,990,779,741.18
  5. Step 5: Solve for x
    x = 10,990,779,741.18/105,089.40
  6. Step 6: Final answer
    x = 104,585.05

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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.