Home / 85,929,947.60-128,894,921.40-51,956,085.20

Finding the Fourth Proportional to 85,929,947.60, 128,894,921.40 and 51,956,085.20

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Solution

The fourth proportional to 85,929,947.60, 128,894,921.40 and 51,956,085.20 is: 77,934,127.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,929,947.60 : 128,894,921.40 = 51,956,085.20 : x
  2. Step 2: Convert to fraction form
    85,929,947.60/128,894,921.40 = 51,956,085.20/x
  3. Step 3: Cross multiply
    85,929,947.60x = 128,894,921.40 × 51,956,085.20
  4. Step 4: Simplify right side
    85,929,947.60x = 6,696,875,518,105,704
  5. Step 5: Solve for x
    x = 6,696,875,518,105,704/85,929,947.60
  6. Step 6: Final answer
    x = 77,934,127.80

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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.