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Finding the Fourth Proportional to 86,931,903.20, 130,413,601.20 and 43,692,288.80

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Solution

The fourth proportional to 86,931,903.20, 130,413,601.20 and 43,692,288.80 is: 65,546,347.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,931,903.20 : 130,413,601.20 = 43,692,288.80 : x
  2. Step 2: Convert to fraction form
    86,931,903.20/130,413,601.20 = 43,692,288.80/x
  3. Step 3: Cross multiply
    86,931,903.20x = 130,413,601.20 × 43,692,288.80
  4. Step 4: Simplify right side
    86,931,903.20x = 5,698,068,727,078,426
  5. Step 5: Solve for x
    x = 5,698,068,727,078,426/86,931,903.20
  6. Step 6: Final answer
    x = 65,546,347.40

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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.