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Finding the Fourth Proportional to 42,702.60, 64,053.90 and 42,119.40

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Solution

The fourth proportional to 42,702.60, 64,053.90 and 42,119.40 is: 63,179.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,702.60 : 64,053.90 = 42,119.40 : x
  2. Step 2: Convert to fraction form
    42,702.60/64,053.90 = 42,119.40/x
  3. Step 3: Cross multiply
    42,702.60x = 64,053.90 × 42,119.40
  4. Step 4: Simplify right side
    42,702.60x = 2,697,911,835.66
  5. Step 5: Solve for x
    x = 2,697,911,835.66/42,702.60
  6. Step 6: Final answer
    x = 63,179.10

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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.