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Finding the Fourth Proportional to 91,602.98, 137,424.08 and 28,421.74

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Solution

The fourth proportional to 91,602.98, 137,424.08 and 28,421.74 is: 42,638.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,602.98 : 137,424.08 = 28,421.74 : x
  2. Step 2: Convert to fraction form
    91,602.98/137,424.08 = 28,421.74/x
  3. Step 3: Cross multiply
    91,602.98x = 137,424.08 × 28,421.74
  4. Step 4: Simplify right side
    91,602.98x = 3,905,831,471.50
  5. Step 5: Solve for x
    x = 3,905,831,471.50/91,602.98
  6. Step 6: Final answer
    x = 42,638.69

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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.