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Finding the Fourth Proportional to 71,892,439.60, 107,838,659.40 and 20,779,625.20

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Solution

The fourth proportional to 71,892,439.60, 107,838,659.40 and 20,779,625.20 is: 31,169,437.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,892,439.60 : 107,838,659.40 = 20,779,625.20 : x
  2. Step 2: Convert to fraction form
    71,892,439.60/107,838,659.40 = 20,779,625.20/x
  3. Step 3: Cross multiply
    71,892,439.60x = 107,838,659.40 × 20,779,625.20
  4. Step 4: Simplify right side
    71,892,439.60x = 2,240,846,924,402,457
  5. Step 5: Solve for x
    x = 2,240,846,924,402,457/71,892,439.60
  6. Step 6: Final answer
    x = 31,169,437.80

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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.