Home / 155,807,720-215,020,984.56-86,191,900.64

Finding the Fourth Proportional to 155,807,720, 215,020,984.56 and 86,191,900.64

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Solution

The fourth proportional to 155,807,720, 215,020,984.56 and 86,191,900.64 is: 118,948,325.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,807,720 : 215,020,984.56 = 86,191,900.64 : x
  2. Step 2: Convert to fraction form
    155,807,720/215,020,984.56 = 86,191,900.64/x
  3. Step 3: Cross multiply
    155,807,720x = 215,020,984.56 × 86,191,900.64
  4. Step 4: Simplify right side
    155,807,720x = 18,533,067,336,710,496
  5. Step 5: Solve for x
    x = 18,533,067,336,710,496/155,807,720
  6. Step 6: Final answer
    x = 118,948,325.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.