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Finding the Fourth Proportional to 92,830.60, 139,322.70 and 42,987.40

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Solution

The fourth proportional to 92,830.60, 139,322.70 and 42,987.40 is: 64,516.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,830.60 : 139,322.70 = 42,987.40 : x
  2. Step 2: Convert to fraction form
    92,830.60/139,322.70 = 42,987.40/x
  3. Step 3: Cross multiply
    92,830.60x = 139,322.70 × 42,987.40
  4. Step 4: Simplify right side
    92,830.60x = 5,989,120,633.98
  5. Step 5: Solve for x
    x = 5,989,120,633.98/92,830.60
  6. Step 6: Final answer
    x = 64,516.66

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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.