Home / 155,939,547.40-215,199,123.76-85,373,980.36

Finding the Fourth Proportional to 155,939,547.40, 215,199,123.76 and 85,373,980.36

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Solution

The fourth proportional to 155,939,547.40, 215,199,123.76 and 85,373,980.36 is: 117,817,488.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,939,547.40 : 215,199,123.76 = 85,373,980.36 : x
  2. Step 2: Convert to fraction form
    155,939,547.40/215,199,123.76 = 85,373,980.36/x
  3. Step 3: Cross multiply
    155,939,547.40x = 215,199,123.76 × 85,373,980.36
  4. Step 4: Simplify right side
    155,939,547.40x = 18,372,405,764,464,368
  5. Step 5: Solve for x
    x = 18,372,405,764,464,368/155,939,547.40
  6. Step 6: Final answer
    x = 117,817,488.07

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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.