Home / 80,862,429.60-121,293,644.40-72,128,426.40

Finding the Fourth Proportional to 80,862,429.60, 121,293,644.40 and 72,128,426.40

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Solution

The fourth proportional to 80,862,429.60, 121,293,644.40 and 72,128,426.40 is: 108,192,639.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,862,429.60 : 121,293,644.40 = 72,128,426.40 : x
  2. Step 2: Convert to fraction form
    80,862,429.60/121,293,644.40 = 72,128,426.40/x
  3. Step 3: Cross multiply
    80,862,429.60x = 121,293,644.40 × 72,128,426.40
  4. Step 4: Simplify right side
    80,862,429.60x = 8,748,719,702,893,173
  5. Step 5: Solve for x
    x = 8,748,719,702,893,173/80,862,429.60
  6. Step 6: Final answer
    x = 108,192,639.60

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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.