Home / 90,644,134.60-135,966,201.90-78,314,703.40

Finding the Fourth Proportional to 90,644,134.60, 135,966,201.90 and 78,314,703.40

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Solution

The fourth proportional to 90,644,134.60, 135,966,201.90 and 78,314,703.40 is: 117,472,055.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,644,134.60 : 135,966,201.90 = 78,314,703.40 : x
  2. Step 2: Convert to fraction form
    90,644,134.60/135,966,201.90 = 78,314,703.40/x
  3. Step 3: Cross multiply
    90,644,134.60x = 135,966,201.90 × 78,314,703.40
  4. Step 4: Simplify right side
    90,644,134.60x = 10,648,152,774,223,018
  5. Step 5: Solve for x
    x = 10,648,152,774,223,018/90,644,134.60
  6. Step 6: Final answer
    x = 117,472,055.10

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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.